InternalizeRefs does not internalize parameters of paths

[selaux]

Calling .InternalizeRefs on a schema that contains parameters on the path level does not seem to resolve those parameters correctly. The resulting schema still contains the reference to the external file. When moving the parameters below the operation level, the behavior is as expected.

Schema

openapi: 3.0.0
info:
  title: foo
  version: 0.0.0
paths:
  /{external1}:
    parameters:
      - in: path
        name: external1
        required: true
        schema:
          $ref: './components.yaml#/components/schemas/External1'
    get:
      responses:
        '204':
          description: No content

components.yaml

components:
  schemas:
    External1:
      type: string

Code

package main

import (
  "context"
  "encoding/json"
  "log"
  "os"

  "github.com/getkin/kin-openapi/openapi3"
)

func main() {
  loader := openapi3.NewLoader()
  loader.IsExternalRefsAllowed = true
  doc, err := loader.LoadFromFile("openapi.yaml")
  if err != nil {
    log.Fatalf("load: %v", err)
  }

  doc.InternalizeRefs(context.Background(), nil)

  result, err := json.MarshalIndent(doc, "", "  ")
  if err != nil {
    log.Fatalf("marshal: %v", err)
  }

  err = os.WriteFile("result.json", result, 0644)
  if err != nil {
    log.Fatalf("result: %v", err)
  }
}

Expected

{
  "components": {
    "schemas": {
      "External1": {
        "type": "string"
      }
    }
  },
  "info": {
    "title": "foo",
    "version": "0.0.0"
  },
  "openapi": "3.0.0",
  "paths": {
    "/{external1}": {
      "get": {
        "responses": {
          "204": {
            "description": "No content"
          }
        }
      },
      "parameters": [
        {
          "in": "path",
          "name": "external1",
          "required": true,
          "schema": {
            "$ref": "#/components/schemas/External1"
          }
        }
      ]
    }
  }
}

Got

{
  "info": {
    "title": "foo",
    "version": "0.0.0"
  },
  "openapi": "3.0.0",
  "paths": {
    "/{external1}": {
      "get": {
        "responses": {
          "204": {
            "description": "No content"
          }
        }
      },
      "parameters": [
        {
          "in": "path",
          "name": "external1",
          "required": true,
          "schema": {
            "$ref": "./components.yaml#/components/schemas/External1"
          }
        }
      ]
    }
  }
}