rebase: bump github.com/kubernetes-csi/external-snapshotter/client/v6

Bumps [github.com/kubernetes-csi/external-snapshotter/client/v6](https://github.com/kubernetes-csi/external-snapshotter) from 6.1.0 to 6.2.0.
- [Release notes](https://github.com/kubernetes-csi/external-snapshotter/releases)
- [Commits](https://github.com/kubernetes-csi/external-snapshotter/compare/v6.1.0...v6.2.0)

---
updated-dependencies:
- dependency-name: github.com/kubernetes-csi/external-snapshotter/client/v6
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/k8s.io/kube-openapi/pkg/validation/spec/fuzz.go

@@ -0,0 +1,502 @@
+/*
+Copyright 2022 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package spec
+
+import (
+	"github.com/go-openapi/jsonreference"
+	"github.com/google/go-cmp/cmp"
+	fuzz "github.com/google/gofuzz"
+)
+
+var SwaggerFuzzFuncs []interface{} = []interface{}{
+	func(v *Responses, c fuzz.Continue) {
+		c.FuzzNoCustom(v)
+		if v.Default != nil {
+			// Check if we hit maxDepth and left an incomplete value
+			if v.Default.Description == "" {
+				v.Default = nil
+				v.StatusCodeResponses = nil
+			}
+		}
+
+		// conversion has no way to discern empty statusCodeResponses from
+		// nil, since "default" is always included in the map.
+		// So avoid empty responses list
+		if len(v.StatusCodeResponses) == 0 {
+			v.StatusCodeResponses = nil
+		}
+	},
+	func(v *Operation, c fuzz.Continue) {
+		c.FuzzNoCustom(v)
+
+		if v != nil {
+			// force non-nil
+			v.Responses = &Responses{}
+			c.Fuzz(v.Responses)
+
+			v.Schemes = nil
+			if c.RandBool() {
+				v.Schemes = append(v.Schemes, "http")
+			}
+
+			if c.RandBool() {
+				v.Schemes = append(v.Schemes, "https")
+			}
+
+			if c.RandBool() {
+				v.Schemes = append(v.Schemes, "ws")
+			}
+
+			if c.RandBool() {
+				v.Schemes = append(v.Schemes, "wss")
+			}
+
+			// Gnostic unconditionally makes security values non-null
+			// So do not fuzz null values into the array.
+			for i, val := range v.Security {
+				if val == nil {
+					v.Security[i] = make(map[string][]string)
+				}
+
+				for k, v := range val {
+					if v == nil {
+						val[k] = make([]string, 0)
+					}
+				}
+			}
+		}
+	},
+	func(v map[int]Response, c fuzz.Continue) {
+		n := 0
+		c.Fuzz(&n)
+		if n == 0 {
+			// Test that fuzzer is not at maxDepth so we do not
+			// end up with empty elements
+			return
+		}
+
+		// Prevent negative numbers
+		num := c.Intn(4)
+		for i := 0; i < num+2; i++ {
+			val := Response{}
+			c.Fuzz(&val)
+
+			val.Description = c.RandString() + "x"
+			v[100*(i+1)+c.Intn(100)] = val
+		}
+	},
+	func(v map[string]PathItem, c fuzz.Continue) {
+		n := 0
+		c.Fuzz(&n)
+		if n == 0 {
+			// Test that fuzzer is not at maxDepth so we do not
+			// end up with empty elements
+			return
+		}
+
+		num := c.Intn(5)
+		for i := 0; i < num+2; i++ {
+			val := PathItem{}
+			c.Fuzz(&val)
+
+			// Ref params are only allowed in certain locations, so
+			// possibly add a few to PathItems
+			numRefsToAdd := c.Intn(5)
+			for i := 0; i < numRefsToAdd; i++ {
+				theRef := Parameter{}
+				c.Fuzz(&theRef.Refable)
+
+				val.Parameters = append(val.Parameters, theRef)
+			}
+
+			v["/"+c.RandString()] = val
+		}
+	},
+	func(v *SchemaOrArray, c fuzz.Continue) {
+		*v = SchemaOrArray{}
+		// gnostic parser just doesn't support more
+		// than one Schema here
+		v.Schema = &Schema{}
+		c.Fuzz(&v.Schema)
+
+	},
+	func(v *SchemaOrBool, c fuzz.Continue) {
+		*v = SchemaOrBool{}
+
+		if c.RandBool() {
+			v.Allows = c.RandBool()
+		} else {
+			v.Schema = &Schema{}
+			v.Allows = true
+			c.Fuzz(&v.Schema)
+		}
+	},
+	func(v map[string]Response, c fuzz.Continue) {
+		n := 0
+		c.Fuzz(&n)
+		if n == 0 {
+			// Test that fuzzer is not at maxDepth so we do not
+			// end up with empty elements
+			return
+		}
+
+		// Response definitions are not allowed to
+		// be refs
+		for i := 0; i < c.Intn(5)+1; i++ {
+			resp := &Response{}
+
+			c.Fuzz(resp)
+			resp.Ref = Ref{}
+			resp.Description = c.RandString() + "x"
+
+			// Response refs are not vendor extensible by gnostic
+			resp.VendorExtensible.Extensions = nil
+			v[c.RandString()+"x"] = *resp
+		}
+	},
+	func(v *Header, c fuzz.Continue) {
+		if v != nil {
+			c.FuzzNoCustom(v)
+
+			// descendant Items of Header may not be refs
+			cur := v.Items
+			for cur != nil {
+				cur.Ref = Ref{}
+				cur = cur.Items
+			}
+		}
+	},
+	func(v *Ref, c fuzz.Continue) {
+		*v = Ref{}
+		v.Ref, _ = jsonreference.New("http://asd.com/" + c.RandString())
+	},
+	func(v *Response, c fuzz.Continue) {
+		*v = Response{}
+		if c.RandBool() {
+			v.Ref = Ref{}
+			v.Ref.Ref, _ = jsonreference.New("http://asd.com/" + c.RandString())
+		} else {
+			c.Fuzz(&v.VendorExtensible)
+			c.Fuzz(&v.Schema)
+			c.Fuzz(&v.ResponseProps)
+
+			v.Headers = nil
+			v.Ref = Ref{}
+
+			n := 0
+			c.Fuzz(&n)
+			if n != 0 {
+				// Test that fuzzer is not at maxDepth so we do not
+				// end up with empty elements
+				num := c.Intn(4)
+				for i := 0; i < num; i++ {
+					if v.Headers == nil {
+						v.Headers = make(map[string]Header)
+					}
+					hdr := Header{}
+					c.Fuzz(&hdr)
+					if hdr.Type == "" {
+						// hit maxDepth, just abort trying to make haders
+						v.Headers = nil
+						break
+					}
+					v.Headers[c.RandString()+"x"] = hdr
+				}
+			} else {
+				v.Headers = nil
+			}
+		}
+
+		v.Description = c.RandString() + "x"
+
+		// Gnostic parses empty as nil, so to keep avoid putting empty
+		if len(v.Headers) == 0 {
+			v.Headers = nil
+		}
+	},
+	func(v **Info, c fuzz.Continue) {
+		// Info is never nil
+		*v = &Info{}
+		c.FuzzNoCustom(*v)
+
+		(*v).Title = c.RandString() + "x"
+	},
+	func(v *Extensions, c fuzz.Continue) {
+		// gnostic parser only picks up x- vendor extensions
+		numChildren := c.Intn(5)
+		for i := 0; i < numChildren; i++ {
+			if *v == nil {
+				*v = Extensions{}
+			}
+			(*v)["x-"+c.RandString()] = c.RandString()
+		}
+	},
+	func(v *Swagger, c fuzz.Continue) {
+		c.FuzzNoCustom(v)
+
+		if v.Paths == nil {
+			// Force paths non-nil since it does not have omitempty in json tag.
+			// This means a perfect roundtrip (via json) is impossible,
+			// since we can't tell the difference between empty/unspecified paths
+			v.Paths = &Paths{}
+			c.Fuzz(v.Paths)
+		}
+
+		v.Swagger = "2.0"
+
+		// Gnostic support serializing ID at all
+		// unavoidable data loss
+		v.ID = ""
+
+		v.Schemes = nil
+		if c.RandUint64()%2 == 1 {
+			v.Schemes = append(v.Schemes, "http")
+		}
+
+		if c.RandUint64()%2 == 1 {
+			v.Schemes = append(v.Schemes, "https")
+		}
+
+		if c.RandUint64()%2 == 1 {
+			v.Schemes = append(v.Schemes, "ws")
+		}
+
+		if c.RandUint64()%2 == 1 {
+			v.Schemes = append(v.Schemes, "wss")
+		}
+
+		// Gnostic unconditionally makes security values non-null
+		// So do not fuzz null values into the array.
+		for i, val := range v.Security {
+			if val == nil {
+				v.Security[i] = make(map[string][]string)
+			}
+
+			for k, v := range val {
+				if v == nil {
+					val[k] = make([]string, 0)
+				}
+			}
+		}
+	},
+	func(v *SecurityScheme, c fuzz.Continue) {
+		v.Description = c.RandString() + "x"
+		c.Fuzz(&v.VendorExtensible)
+
+		switch c.Intn(3) {
+		case 0:
+			v.Type = "basic"
+		case 1:
+			v.Type = "apiKey"
+			switch c.Intn(2) {
+			case 0:
+				v.In = "header"
+			case 1:
+				v.In = "query"
+			default:
+				panic("unreachable")
+			}
+			v.Name = "x" + c.RandString()
+		case 2:
+			v.Type = "oauth2"
+
+			switch c.Intn(4) {
+			case 0:
+				v.Flow = "accessCode"
+				v.TokenURL = "https://" + c.RandString()
+				v.AuthorizationURL = "https://" + c.RandString()
+			case 1:
+				v.Flow = "application"
+				v.TokenURL = "https://" + c.RandString()
+			case 2:
+				v.Flow = "implicit"
+				v.AuthorizationURL = "https://" + c.RandString()
+			case 3:
+				v.Flow = "password"
+				v.TokenURL = "https://" + c.RandString()
+			default:
+				panic("unreachable")
+			}
+			c.Fuzz(&v.Scopes)
+		default:
+			panic("unreachable")
+		}
+	},
+	func(v *interface{}, c fuzz.Continue) {
+		*v = c.RandString() + "x"
+	},
+	func(v *string, c fuzz.Continue) {
+		*v = c.RandString() + "x"
+	},
+	func(v *ExternalDocumentation, c fuzz.Continue) {
+		v.Description = c.RandString() + "x"
+		v.URL = c.RandString() + "x"
+	},
+	func(v *SimpleSchema, c fuzz.Continue) {
+		c.FuzzNoCustom(v)
+
+		switch c.Intn(5) {
+		case 0:
+			v.Type = "string"
+		case 1:
+			v.Type = "number"
+		case 2:
+			v.Type = "boolean"
+		case 3:
+			v.Type = "integer"
+		case 4:
+			v.Type = "array"
+		default:
+			panic("unreachable")
+		}
+
+		switch c.Intn(5) {
+		case 0:
+			v.CollectionFormat = "csv"
+		case 1:
+			v.CollectionFormat = "ssv"
+		case 2:
+			v.CollectionFormat = "tsv"
+		case 3:
+			v.CollectionFormat = "pipes"
+		case 4:
+			v.CollectionFormat = ""
+		default:
+			panic("unreachable")
+		}
+
+		// None of the types which include SimpleSchema in our definitions
+		// actually support "example" in the official spec
+		v.Example = nil
+
+		// unsupported by openapi
+		v.Nullable = false
+	},
+	func(v *int64, c fuzz.Continue) {
+		c.Fuzz(v)
+
+		// Gnostic does not differentiate between 0 and non-specified
+		// so avoid using 0 for fuzzer
+		if *v == 0 {
+			*v = 1
+		}
+	},
+	func(v *float64, c fuzz.Continue) {
+		c.Fuzz(v)
+
+		// Gnostic does not differentiate between 0 and non-specified
+		// so avoid using 0 for fuzzer
+		if *v == 0.0 {
+			*v = 1.0
+		}
+	},
+	func(v *Parameter, c fuzz.Continue) {
+		if v == nil {
+			return
+		}
+		c.Fuzz(&v.VendorExtensible)
+		if c.RandBool() {
+			// body param
+			v.Description = c.RandString() + "x"
+			v.Name = c.RandString() + "x"
+			v.In = "body"
+			c.Fuzz(&v.Description)
+			c.Fuzz(&v.Required)
+
+			v.Schema = &Schema{}
+			c.Fuzz(&v.Schema)
+
+		} else {
+			c.Fuzz(&v.SimpleSchema)
+			c.Fuzz(&v.CommonValidations)
+			v.AllowEmptyValue = false
+			v.Description = c.RandString() + "x"
+			v.Name = c.RandString() + "x"
+
+			switch c.Intn(4) {
+			case 0:
+				// Header param
+				v.In = "header"
+			case 1:
+				// Form data param
+				v.In = "formData"
+				v.AllowEmptyValue = c.RandBool()
+			case 2:
+				// Query param
+				v.In = "query"
+				v.AllowEmptyValue = c.RandBool()
+			case 3:
+				// Path param
+				v.In = "path"
+				v.Required = true
+			default:
+				panic("unreachable")
+			}
+
+			// descendant Items of Parameter may not be refs
+			cur := v.Items
+			for cur != nil {
+				cur.Ref = Ref{}
+				cur = cur.Items
+			}
+		}
+	},
+	func(v *Schema, c fuzz.Continue) {
+		if c.RandBool() {
+			// file schema
+			c.Fuzz(&v.Default)
+			c.Fuzz(&v.Description)
+			c.Fuzz(&v.Example)
+			c.Fuzz(&v.ExternalDocs)
+
+			c.Fuzz(&v.Format)
+			c.Fuzz(&v.ReadOnly)
+			c.Fuzz(&v.Required)
+			c.Fuzz(&v.Title)
+			v.Type = StringOrArray{"file"}
+
+		} else {
+			// normal schema
+			c.Fuzz(&v.SchemaProps)
+			c.Fuzz(&v.SwaggerSchemaProps)
+			c.Fuzz(&v.VendorExtensible)
+			// c.Fuzz(&v.ExtraProps)
+			// ExtraProps will not roundtrip - gnostic throws out
+			// unrecognized keys
+		}
+
+		// Not supported by official openapi v2 spec
+		// and stripped by k8s apiserver
+		v.ID = ""
+		v.AnyOf = nil
+		v.OneOf = nil
+		v.Not = nil
+		v.Nullable = false
+		v.AdditionalItems = nil
+		v.Schema = ""
+		v.PatternProperties = nil
+		v.Definitions = nil
+		v.Dependencies = nil
+	},
+}
+
+var SwaggerDiffOptions = []cmp.Option{
+	// cmp.Diff panics on Ref since jsonreference.Ref uses unexported fields
+	cmp.Comparer(func(a Ref, b Ref) bool {
+		return a.String() == b.String()
+	}),
+}

vendor/k8s.io/kube-openapi/pkg/validation/spec/gnostic.go

@@ -219,8 +219,8 @@ func (k *Ref) FromGnostic(g string) error {
 // Caveats:
 //
 // - gnostic v2 documents treats zero as unspecified for numerical fields of
-//CommonValidations fields such as Maximum, Minimum, MaximumItems, etc.
-//There will always be data loss if one of the values of these fields is set to zero.
+// CommonValidations fields such as Maximum, Minimum, MaximumItems, etc.
+// There will always be data loss if one of the values of these fields is set to zero.
 //
 // Returns:
 //
@@ -1263,6 +1263,8 @@ func (k *Schema) FromGnostic(g *openapi_v2.Schema) (ok bool, err error) {
 			k.AdditionalProperties.Allows = g.AdditionalProperties.GetBoolean()
 		} else {
 			k.AdditionalProperties.Schema = &Schema{}
+			k.AdditionalProperties.Allows = true
+
 			if nok, err := k.AdditionalProperties.Schema.FromGnostic(g.AdditionalProperties.GetSchema()); err != nil {
 				return false, err
 			} else if !nok {

vendor/k8s.io/kube-openapi/pkg/validation/spec/header.go

@@ -18,6 +18,8 @@ import (
 	"encoding/json"
 
 	"github.com/go-openapi/swag"
+	"k8s.io/kube-openapi/pkg/internal"
+	jsonv2 "k8s.io/kube-openapi/pkg/internal/third_party/go-json-experiment/json"
 )
 
 const (
@@ -62,6 +64,10 @@ func (h Header) MarshalJSON() ([]byte, error) {
 
 // UnmarshalJSON unmarshals this header from JSON
 func (h *Header) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, h)
+	}
+
 	if err := json.Unmarshal(data, &h.CommonValidations); err != nil {
 		return err
 	}
@@ -73,3 +79,27 @@ func (h *Header) UnmarshalJSON(data []byte) error {
 	}
 	return json.Unmarshal(data, &h.HeaderProps)
 }
+
+func (h *Header) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	var x struct {
+		CommonValidations
+		SimpleSchema
+		Extensions
+		HeaderProps
+	}
+
+	if err := opts.UnmarshalNext(dec, &x); err != nil {
+		return err
+	}
+
+	h.CommonValidations = x.CommonValidations
+	h.SimpleSchema = x.SimpleSchema
+	h.Extensions = x.Extensions
+	h.HeaderProps = x.HeaderProps
+
+	h.Extensions.sanitize()
+	if len(h.Extensions) == 0 {
+		h.Extensions = nil
+	}
+	return nil
+}

vendor/k8s.io/kube-openapi/pkg/validation/spec/info.go

@@ -19,6 +19,8 @@ import (
 	"strings"
 
 	"github.com/go-openapi/swag"
+	"k8s.io/kube-openapi/pkg/internal"
+	jsonv2 "k8s.io/kube-openapi/pkg/internal/third_party/go-json-experiment/json"
 )
 
 // Extensions vendor specific extensions
@@ -87,6 +89,31 @@ func (e Extensions) GetObject(key string, out interface{}) error {
 	return nil
 }
 
+func (e Extensions) sanitize() {
+	for k := range e {
+		if !isExtensionKey(k) {
+			delete(e, k)
+		}
+	}
+}
+
+func (e Extensions) sanitizeWithExtra() (extra map[string]any) {
+	for k, v := range e {
+		if !isExtensionKey(k) {
+			if extra == nil {
+				extra = make(map[string]any)
+			}
+			extra[k] = v
+			delete(e, k)
+		}
+	}
+	return extra
+}
+
+func isExtensionKey(k string) bool {
+	return len(k) > 1 && (k[0] == 'x' || k[0] == 'X') && k[1] == '-'
+}
+
 // VendorExtensible composition block.
 type VendorExtensible struct {
 	Extensions Extensions
@@ -167,8 +194,29 @@ func (i Info) MarshalJSON() ([]byte, error) {
 
 // UnmarshalJSON marshal this from JSON
 func (i *Info) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, i)
+	}
+
 	if err := json.Unmarshal(data, &i.InfoProps); err != nil {
 		return err
 	}
 	return json.Unmarshal(data, &i.VendorExtensible)
 }
+
+func (i *Info) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	var x struct {
+		Extensions
+		InfoProps
+	}
+	if err := opts.UnmarshalNext(dec, &x); err != nil {
+		return err
+	}
+	x.Extensions.sanitize()
+	if len(x.Extensions) == 0 {
+		x.Extensions = nil
+	}
+	i.VendorExtensible.Extensions = x.Extensions
+	i.InfoProps = x.InfoProps
+	return nil
+}

vendor/k8s.io/kube-openapi/pkg/validation/spec/items.go

@@ -18,6 +18,8 @@ import (
 	"encoding/json"
 
 	"github.com/go-openapi/swag"
+	"k8s.io/kube-openapi/pkg/internal"
+	jsonv2 "k8s.io/kube-openapi/pkg/internal/third_party/go-json-experiment/json"
 )
 
 const (
@@ -64,6 +66,10 @@ type Items struct {
 
 // UnmarshalJSON hydrates this items instance with the data from JSON
 func (i *Items) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, i)
+	}
+
 	var validations CommonValidations
 	if err := json.Unmarshal(data, &validations); err != nil {
 		return err
@@ -87,6 +93,28 @@ func (i *Items) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
+func (i *Items) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	var x struct {
+		CommonValidations
+		SimpleSchema
+		Extensions
+	}
+	if err := opts.UnmarshalNext(dec, &x); err != nil {
+		return err
+	}
+	if err := i.Refable.Ref.fromMap(x.Extensions); err != nil {
+		return err
+	}
+	x.Extensions.sanitize()
+	if len(x.Extensions) == 0 {
+		x.Extensions = nil
+	}
+	i.CommonValidations = x.CommonValidations
+	i.SimpleSchema = x.SimpleSchema
+	i.VendorExtensible.Extensions = x.Extensions
+	return nil
+}
+
 // MarshalJSON converts this items object to JSON
 func (i Items) MarshalJSON() ([]byte, error) {
 	b1, err := json.Marshal(i.CommonValidations)

vendor/k8s.io/kube-openapi/pkg/validation/spec/operation.go

@@ -18,6 +18,8 @@ import (
 	"encoding/json"
 
 	"github.com/go-openapi/swag"
+	"k8s.io/kube-openapi/pkg/internal"
+	jsonv2 "k8s.io/kube-openapi/pkg/internal/third_party/go-json-experiment/json"
 )
 
 // OperationProps describes an operation
@@ -75,12 +77,34 @@ type Operation struct {
 
 // UnmarshalJSON hydrates this items instance with the data from JSON
 func (o *Operation) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, o)
+	}
+
 	if err := json.Unmarshal(data, &o.OperationProps); err != nil {
 		return err
 	}
 	return json.Unmarshal(data, &o.VendorExtensible)
 }
 
+func (o *Operation) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	type OperationPropsNoMethods OperationProps // strip MarshalJSON method
+	var x struct {
+		Extensions
+		OperationPropsNoMethods
+	}
+	if err := opts.UnmarshalNext(dec, &x); err != nil {
+		return err
+	}
+	x.Extensions.sanitize()
+	if len(x.Extensions) == 0 {
+		x.Extensions = nil
+	}
+	o.VendorExtensible.Extensions = x.Extensions
+	o.OperationProps = OperationProps(x.OperationPropsNoMethods)
+	return nil
+}
+
 // MarshalJSON converts this items object to JSON
 func (o Operation) MarshalJSON() ([]byte, error) {
 	b1, err := json.Marshal(o.OperationProps)

vendor/k8s.io/kube-openapi/pkg/validation/spec/parameter.go

@@ -18,6 +18,8 @@ import (
 	"encoding/json"
 
 	"github.com/go-openapi/swag"
+	"k8s.io/kube-openapi/pkg/internal"
+	jsonv2 "k8s.io/kube-openapi/pkg/internal/third_party/go-json-experiment/json"
 )
 
 // ParamProps describes the specific attributes of an operation parameter
@@ -38,26 +40,31 @@ type ParamProps struct {
 //
 // There are five possible parameter types.
 // * Path - Used together with [Path Templating](#pathTemplating), where the parameter value is actually part
-//   of the operation's URL. This does not include the host or base path of the API. For example, in `/items/{itemId}`,
-//   the path parameter is `itemId`.
+//
+//	of the operation's URL. This does not include the host or base path of the API. For example, in `/items/{itemId}`,
+//	the path parameter is `itemId`.
+//
 // * Query - Parameters that are appended to the URL. For example, in `/items?id=###`, the query parameter is `id`.
 // * Header - Custom headers that are expected as part of the request.
 // * Body - The payload that's appended to the HTTP request. Since there can only be one payload, there can only be
-//   _one_ body parameter. The name of the body parameter has no effect on the parameter itself and is used for
-//   documentation purposes only. Since Form parameters are also in the payload, body and form parameters cannot exist
-//   together for the same operation.
+//
+//	_one_ body parameter. The name of the body parameter has no effect on the parameter itself and is used for
+//	documentation purposes only. Since Form parameters are also in the payload, body and form parameters cannot exist
+//	together for the same operation.
+//
 // * Form - Used to describe the payload of an HTTP request when either `application/x-www-form-urlencoded` or
-//   `multipart/form-data` are used as the content type of the request (in Swagger's definition,
-//   the [`consumes`](#operationConsumes) property of an operation). This is the only parameter type that can be used
-//   to send files, thus supporting the `file` type. Since form parameters are sent in the payload, they cannot be
-//   declared together with a body parameter for the same operation. Form parameters have a different format based on
-//   the content-type used (for further details, consult http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4).
-//   * `application/x-www-form-urlencoded` - Similar to the format of Query parameters but as a payload.
-//   For example, `foo=1&bar=swagger` - both `foo` and `bar` are form parameters. This is normally used for simple
-//   parameters that are being transferred.
-//   * `multipart/form-data` - each parameter takes a section in the payload with an internal header.
-//   For example, for the header `Content-Disposition: form-data; name="submit-name"` the name of the parameter is
-//   `submit-name`. This type of form parameters is more commonly used for file transfers.
+//
+//	`multipart/form-data` are used as the content type of the request (in Swagger's definition,
+//	the [`consumes`](#operationConsumes) property of an operation). This is the only parameter type that can be used
+//	to send files, thus supporting the `file` type. Since form parameters are sent in the payload, they cannot be
+//	declared together with a body parameter for the same operation. Form parameters have a different format based on
+//	the content-type used (for further details, consult http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4).
+//	* `application/x-www-form-urlencoded` - Similar to the format of Query parameters but as a payload.
+//	For example, `foo=1&bar=swagger` - both `foo` and `bar` are form parameters. This is normally used for simple
+//	parameters that are being transferred.
+//	* `multipart/form-data` - each parameter takes a section in the payload with an internal header.
+//	For example, for the header `Content-Disposition: form-data; name="submit-name"` the name of the parameter is
+//	`submit-name`. This type of form parameters is more commonly used for file transfers.
 //
 // For more information: http://goo.gl/8us55a#parameterObject
 type Parameter struct {
@@ -70,6 +77,10 @@ type Parameter struct {
 
 // UnmarshalJSON hydrates this items instance with the data from JSON
 func (p *Parameter) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, p)
+	}
+
 	if err := json.Unmarshal(data, &p.CommonValidations); err != nil {
 		return err
 	}
@@ -85,6 +96,30 @@ func (p *Parameter) UnmarshalJSON(data []byte) error {
 	return json.Unmarshal(data, &p.ParamProps)
 }
 
+func (p *Parameter) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	var x struct {
+		CommonValidations
+		SimpleSchema
+		Extensions
+		ParamProps
+	}
+	if err := opts.UnmarshalNext(dec, &x); err != nil {
+		return err
+	}
+	if err := p.Refable.Ref.fromMap(x.Extensions); err != nil {
+		return err
+	}
+	x.Extensions.sanitize()
+	if len(x.Extensions) == 0 {
+		x.Extensions = nil
+	}
+	p.CommonValidations = x.CommonValidations
+	p.SimpleSchema = x.SimpleSchema
+	p.VendorExtensible.Extensions = x.Extensions
+	p.ParamProps = x.ParamProps
+	return nil
+}
+
 // MarshalJSON converts this items object to JSON
 func (p Parameter) MarshalJSON() ([]byte, error) {
 	b1, err := json.Marshal(p.CommonValidations)

vendor/k8s.io/kube-openapi/pkg/validation/spec/path_item.go

@@ -18,6 +18,8 @@ import (
 	"encoding/json"
 
 	"github.com/go-openapi/swag"
+	"k8s.io/kube-openapi/pkg/internal"
+	jsonv2 "k8s.io/kube-openapi/pkg/internal/third_party/go-json-experiment/json"
 )
 
 // PathItemProps the path item specific properties
@@ -46,6 +48,10 @@ type PathItem struct {
 
 // UnmarshalJSON hydrates this items instance with the data from JSON
 func (p *PathItem) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, p)
+	}
+
 	if err := json.Unmarshal(data, &p.Refable); err != nil {
 		return err
 	}
@@ -55,6 +61,31 @@ func (p *PathItem) UnmarshalJSON(data []byte) error {
 	return json.Unmarshal(data, &p.PathItemProps)
 }
 
+func (p *PathItem) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	var x struct {
+		Extensions
+		PathItemProps
+	}
+
+	if err := opts.UnmarshalNext(dec, &x); err != nil {
+		return err
+	}
+
+	p.Extensions = x.Extensions
+	p.PathItemProps = x.PathItemProps
+
+	if err := p.Refable.Ref.fromMap(p.Extensions); err != nil {
+		return err
+	}
+
+	p.Extensions.sanitize()
+	if len(p.Extensions) == 0 {
+		p.Extensions = nil
+	}
+
+	return nil
+}
+
 // MarshalJSON converts this items object to JSON
 func (p PathItem) MarshalJSON() ([]byte, error) {
 	b3, err := json.Marshal(p.Refable)

vendor/k8s.io/kube-openapi/pkg/validation/spec/paths.go

@@ -16,9 +16,12 @@ package spec
 
 import (
 	"encoding/json"
+	"fmt"
 	"strings"
 
 	"github.com/go-openapi/swag"
+	"k8s.io/kube-openapi/pkg/internal"
+	jsonv2 "k8s.io/kube-openapi/pkg/internal/third_party/go-json-experiment/json"
 )
 
 // Paths holds the relative paths to the individual endpoints.
@@ -34,6 +37,10 @@ type Paths struct {
 
 // UnmarshalJSON hydrates this items instance with the data from JSON
 func (p *Paths) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, p)
+	}
+
 	var res map[string]json.RawMessage
 	if err := json.Unmarshal(data, &res); err != nil {
 		return err
@@ -63,6 +70,58 @@ func (p *Paths) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
+func (p *Paths) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	tok, err := dec.ReadToken()
+	if err != nil {
+		return err
+	}
+	var ext any
+	var pi PathItem
+	switch k := tok.Kind(); k {
+	case 'n':
+		return nil // noop
+	case '{':
+		for {
+			tok, err := dec.ReadToken()
+			if err != nil {
+				return err
+			}
+
+			if tok.Kind() == '}' {
+				return nil
+			}
+
+			switch k := tok.String(); {
+			case isExtensionKey(k):
+				ext = nil
+				if err := opts.UnmarshalNext(dec, &ext); err != nil {
+					return err
+				}
+
+				if p.Extensions == nil {
+					p.Extensions = make(map[string]any)
+				}
+				p.Extensions[k] = ext
+			case len(k) > 0 && k[0] == '/':
+				pi = PathItem{}
+				if err := opts.UnmarshalNext(dec, &pi); err != nil {
+					return err
+				}
+
+				if p.Paths == nil {
+					p.Paths = make(map[string]PathItem)
+				}
+				p.Paths[k] = pi
+			default:
+				_, err := dec.ReadValue() // skip value
+				return err
+			}
+		}
+	default:
+		return fmt.Errorf("unknown JSON kind: %v", k)
+	}
+}
+
 // MarshalJSON converts this items object to JSON
 func (p Paths) MarshalJSON() ([]byte, error) {
 	b1, err := json.Marshal(p.VendorExtensible)

vendor/k8s.io/kube-openapi/pkg/validation/spec/response.go

@@ -18,6 +18,8 @@ import (
 	"encoding/json"
 
 	"github.com/go-openapi/swag"
+	"k8s.io/kube-openapi/pkg/internal"
+	jsonv2 "k8s.io/kube-openapi/pkg/internal/third_party/go-json-experiment/json"
 )
 
 // ResponseProps properties specific to a response
@@ -39,13 +41,46 @@ type Response struct {
 
 // UnmarshalJSON hydrates this items instance with the data from JSON
 func (r *Response) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, r)
+	}
+
 	if err := json.Unmarshal(data, &r.ResponseProps); err != nil {
 		return err
 	}
 	if err := json.Unmarshal(data, &r.Refable); err != nil {
 		return err
 	}
-	return json.Unmarshal(data, &r.VendorExtensible)
+	if err := json.Unmarshal(data, &r.VendorExtensible); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (r *Response) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	var x struct {
+		ResponseProps
+		Extensions
+	}
+
+	if err := opts.UnmarshalNext(dec, &x); err != nil {
+		return err
+	}
+
+	r.Extensions = x.Extensions
+	r.ResponseProps = x.ResponseProps
+
+	if err := r.Refable.Ref.fromMap(r.Extensions); err != nil {
+		return err
+	}
+
+	r.Extensions.sanitize()
+	if len(r.Extensions) == 0 {
+		r.Extensions = nil
+	}
+
+	return nil
 }
 
 // MarshalJSON converts this items object to JSON

vendor/k8s.io/kube-openapi/pkg/validation/spec/responses.go

@@ -16,10 +16,13 @@ package spec
 
 import (
 	"encoding/json"
+	"fmt"
 	"reflect"
 	"strconv"
 
 	"github.com/go-openapi/swag"
+	"k8s.io/kube-openapi/pkg/internal"
+	jsonv2 "k8s.io/kube-openapi/pkg/internal/third_party/go-json-experiment/json"
 )
 
 // Responses is a container for the expected responses of an operation.
@@ -42,6 +45,10 @@ type Responses struct {
 
 // UnmarshalJSON hydrates this items instance with the data from JSON
 func (r *Responses) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, r)
+	}
+
 	if err := json.Unmarshal(data, &r.ResponsesProps); err != nil {
 		return err
 	}
@@ -90,21 +97,90 @@ func (r ResponsesProps) MarshalJSON() ([]byte, error) {
 
 // UnmarshalJSON unmarshals responses from JSON
 func (r *ResponsesProps) UnmarshalJSON(data []byte) error {
-	var res map[string]Response
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, r)
+	}
+	var res map[string]json.RawMessage
 	if err := json.Unmarshal(data, &res); err != nil {
-		return nil
+		return err
 	}
 	if v, ok := res["default"]; ok {
-		r.Default = &v
+		value := Response{}
+		if err := json.Unmarshal(v, &value); err != nil {
+			return err
+		}
+		r.Default = &value
 		delete(res, "default")
 	}
 	for k, v := range res {
+		// Take all integral keys
 		if nk, err := strconv.Atoi(k); err == nil {
 			if r.StatusCodeResponses == nil {
 				r.StatusCodeResponses = map[int]Response{}
 			}
-			r.StatusCodeResponses[nk] = v
+			value := Response{}
+			if err := json.Unmarshal(v, &value); err != nil {
+				return err
+			}
+			r.StatusCodeResponses[nk] = value
 		}
 	}
 	return nil
 }
+
+func (r *Responses) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) (err error) {
+	tok, err := dec.ReadToken()
+	if err != nil {
+		return err
+	}
+	var ext any
+	var resp Response
+	switch k := tok.Kind(); k {
+	case 'n':
+		return nil // noop
+	case '{':
+		for {
+			tok, err := dec.ReadToken()
+			if err != nil {
+				return err
+			}
+			if tok.Kind() == '}' {
+				return nil
+			}
+			switch k := tok.String(); {
+			case isExtensionKey(k):
+				ext = nil
+				if err := opts.UnmarshalNext(dec, &ext); err != nil {
+					return err
+				}
+
+				if r.Extensions == nil {
+					r.Extensions = make(map[string]any)
+				}
+				r.Extensions[k] = ext
+			case k == "default":
+				resp = Response{}
+				if err := opts.UnmarshalNext(dec, &resp); err != nil {
+					return err
+				}
+
+				respCopy := resp
+				r.ResponsesProps.Default = &respCopy
+			default:
+				if nk, err := strconv.Atoi(k); err == nil {
+					resp = Response{}
+					if err := opts.UnmarshalNext(dec, &resp); err != nil {
+						return err
+					}
+
+					if r.StatusCodeResponses == nil {
+						r.StatusCodeResponses = map[int]Response{}
+					}
+					r.StatusCodeResponses[nk] = resp
+				}
+			}
+		}
+	default:
+		return fmt.Errorf("unknown JSON kind: %v", k)
+	}
+}

vendor/k8s.io/kube-openapi/pkg/validation/spec/schema.go

@@ -21,6 +21,8 @@ import (
 	"strings"
 
 	"github.com/go-openapi/swag"
+	"k8s.io/kube-openapi/pkg/internal"
+	jsonv2 "k8s.io/kube-openapi/pkg/internal/third_party/go-json-experiment/json"
 )
 
 // BooleanProperty creates a boolean property
@@ -465,6 +467,10 @@ func (s Schema) MarshalJSON() ([]byte, error) {
 
 // UnmarshalJSON marshal this from JSON
 func (s *Schema) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, s)
+	}
+
 	props := struct {
 		SchemaProps
 		SwaggerSchemaProps
@@ -511,3 +517,38 @@ func (s *Schema) UnmarshalJSON(data []byte) error {
 
 	return nil
 }
+
+func (s *Schema) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	var x struct {
+		Extensions
+		SchemaProps
+		SwaggerSchemaProps
+	}
+	if err := opts.UnmarshalNext(dec, &x); err != nil {
+		return err
+	}
+
+	if err := x.Ref.fromMap(x.Extensions); err != nil {
+		return err
+	}
+
+	if err := x.Schema.fromMap(x.Extensions); err != nil {
+		return err
+	}
+
+	delete(x.Extensions, "$ref")
+	delete(x.Extensions, "$schema")
+
+	for _, pn := range swag.DefaultJSONNameProvider.GetJSONNames(s) {
+		delete(x.Extensions, pn)
+	}
+	if len(x.Extensions) == 0 {
+		x.Extensions = nil
+	}
+
+	s.ExtraProps = x.Extensions.sanitizeWithExtra()
+	s.VendorExtensible.Extensions = x.Extensions
+	s.SchemaProps = x.SchemaProps
+	s.SwaggerSchemaProps = x.SwaggerSchemaProps
+	return nil
+}

vendor/k8s.io/kube-openapi/pkg/validation/spec/security_scheme.go

@@ -18,6 +18,7 @@ import (
 	"encoding/json"
 
 	"github.com/go-openapi/swag"
+	jsonv2 "k8s.io/kube-openapi/pkg/internal/third_party/go-json-experiment/json"
 )
 
 // SecuritySchemeProps describes a swagger security scheme in the securityDefinitions section
@@ -62,3 +63,20 @@ func (s *SecurityScheme) UnmarshalJSON(data []byte) error {
 	}
 	return json.Unmarshal(data, &s.VendorExtensible)
 }
+
+func (s *SecurityScheme) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	var x struct {
+		Extensions
+		SecuritySchemeProps
+	}
+	if err := opts.UnmarshalNext(dec, &x); err != nil {
+		return err
+	}
+	x.Extensions.sanitize()
+	if len(x.Extensions) == 0 {
+		x.Extensions = nil
+	}
+	s.VendorExtensible.Extensions = x.Extensions
+	s.SecuritySchemeProps = x.SecuritySchemeProps
+	return nil
+}

vendor/k8s.io/kube-openapi/pkg/validation/spec/swagger.go

@@ -19,6 +19,8 @@ import (
 	"fmt"
 
 	"github.com/go-openapi/swag"
+	"k8s.io/kube-openapi/pkg/internal"
+	jsonv2 "k8s.io/kube-openapi/pkg/internal/third_party/go-json-experiment/json"
 )
 
 // Swagger this is the root document object for the API specification.
@@ -46,6 +48,10 @@ func (s Swagger) MarshalJSON() ([]byte, error) {
 
 // UnmarshalJSON unmarshals a swagger spec from json
 func (s *Swagger) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, s)
+	}
+
 	var sw Swagger
 	if err := json.Unmarshal(data, &sw.SwaggerProps); err != nil {
 		return err
@@ -57,6 +63,30 @@ func (s *Swagger) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
+func (s *Swagger) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	// Note: If you're willing to make breaking changes, it is possible to
+	// optimize this and other usages of this pattern:
+	// https://github.com/kubernetes/kube-openapi/pull/319#discussion_r983165948
+	var x struct {
+		Extensions
+		SwaggerProps
+	}
+
+	if err := opts.UnmarshalNext(dec, &x); err != nil {
+		return err
+	}
+
+	s.Extensions = x.Extensions
+	s.SwaggerProps = x.SwaggerProps
+
+	s.Extensions.sanitize()
+	if len(s.Extensions) == 0 {
+		s.Extensions = nil
+	}
+
+	return nil
+}
+
 // SwaggerProps captures the top-level properties of an Api specification
 //
 // NOTE: validation rules
@@ -108,6 +138,10 @@ func (s SchemaOrBool) MarshalJSON() ([]byte, error) {
 
 // UnmarshalJSON converts this bool or schema object from a JSON structure
 func (s *SchemaOrBool) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, s)
+	}
+
 	var nw SchemaOrBool
 	if len(data) >= 4 {
 		if data[0] == '{' {
@@ -123,6 +157,26 @@ func (s *SchemaOrBool) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
+func (s *SchemaOrBool) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	switch k := dec.PeekKind(); k {
+	case '{':
+		err := opts.UnmarshalNext(dec, &s.Schema)
+		if err != nil {
+			return err
+		}
+		s.Allows = true
+		return nil
+	case 't', 'f':
+		err := opts.UnmarshalNext(dec, &s.Allows)
+		if err != nil {
+			return err
+		}
+		return nil
+	default:
+		return fmt.Errorf("expected object or bool, not '%v'", k.String())
+	}
+}
+
 // SchemaOrStringArray represents a schema or a string array
 type SchemaOrStringArray struct {
 	Schema   *Schema
@@ -142,6 +196,10 @@ func (s SchemaOrStringArray) MarshalJSON() ([]byte, error) {
 
 // UnmarshalJSON converts this schema object or array from a JSON structure
 func (s *SchemaOrStringArray) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, s)
+	}
+
 	var first byte
 	if len(data) > 1 {
 		first = data[0]
@@ -163,6 +221,18 @@ func (s *SchemaOrStringArray) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
+func (s *SchemaOrStringArray) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	switch dec.PeekKind() {
+	case '{':
+		return opts.UnmarshalNext(dec, &s.Schema)
+	case '[':
+		return opts.UnmarshalNext(dec, &s.Property)
+	default:
+		_, err := dec.ReadValue()
+		return err
+	}
+}
+
 // Definitions contains the models explicitly defined in this spec
 // An object to hold data types that can be consumed and produced by operations.
 // These data types can be primitives, arrays or models.
@@ -193,6 +263,10 @@ func (s StringOrArray) Contains(value string) bool {
 
 // UnmarshalJSON unmarshals this string or array object from a JSON array or JSON string
 func (s *StringOrArray) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, s)
+	}
+
 	var first byte
 	if len(data) > 1 {
 		first = data[0]
@@ -223,6 +297,23 @@ func (s *StringOrArray) UnmarshalJSON(data []byte) error {
 	}
 }
 
+func (s *StringOrArray) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	switch k := dec.PeekKind(); k {
+	case '[':
+		*s = StringOrArray{}
+		return opts.UnmarshalNext(dec, (*[]string)(s))
+	case '"':
+		*s = StringOrArray{""}
+		return opts.UnmarshalNext(dec, &(*s)[0])
+	case 'n':
+		// Throw out null token
+		_, _ = dec.ReadToken()
+		return nil
+	default:
+		return fmt.Errorf("expected string or array, not '%v'", k.String())
+	}
+}
+
 // MarshalJSON converts this string or array to a JSON array or JSON string
 func (s StringOrArray) MarshalJSON() ([]byte, error) {
 	if len(s) == 1 {
@@ -264,6 +355,10 @@ func (s SchemaOrArray) MarshalJSON() ([]byte, error) {
 
 // UnmarshalJSON converts this schema object or array from a JSON structure
 func (s *SchemaOrArray) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, s)
+	}
+
 	var nw SchemaOrArray
 	var first byte
 	if len(data) > 1 {
@@ -284,3 +379,15 @@ func (s *SchemaOrArray) UnmarshalJSON(data []byte) error {
 	*s = nw
 	return nil
 }
+
+func (s *SchemaOrArray) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	switch dec.PeekKind() {
+	case '{':
+		return opts.UnmarshalNext(dec, &s.Schema)
+	case '[':
+		return opts.UnmarshalNext(dec, &s.Schemas)
+	default:
+		_, err := dec.ReadValue()
+		return err
+	}
+}

vendor/k8s.io/kube-openapi/pkg/validation/spec/tag.go

@@ -18,6 +18,8 @@ import (
 	"encoding/json"
 
 	"github.com/go-openapi/swag"
+	"k8s.io/kube-openapi/pkg/internal"
+	jsonv2 "k8s.io/kube-openapi/pkg/internal/third_party/go-json-experiment/json"
 )
 
 // TagProps describe a tag entry in the top level tags section of a swagger spec
@@ -52,8 +54,29 @@ func (t Tag) MarshalJSON() ([]byte, error) {
 
 // UnmarshalJSON marshal this from JSON
 func (t *Tag) UnmarshalJSON(data []byte) error {
+	if internal.UseOptimizedJSONUnmarshaling {
+		return jsonv2.Unmarshal(data, t)
+	}
+
 	if err := json.Unmarshal(data, &t.TagProps); err != nil {
 		return err
 	}
 	return json.Unmarshal(data, &t.VendorExtensible)
 }
+
+func (t *Tag) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decoder) error {
+	var x struct {
+		Extensions
+		TagProps
+	}
+	if err := opts.UnmarshalNext(dec, &x); err != nil {
+		return err
+	}
+	x.Extensions.sanitize()
+	if len(x.Extensions) == 0 {
+		x.Extensions = nil
+	}
+	t.VendorExtensible.Extensions = x.Extensions
+	t.TagProps = x.TagProps
+	return nil
+}