v2 to v3 converter: extension in parameters are lost

[jmini]

Give this Swagger v2 Spec:

swagger: "2.0"
info:
  version: "1.0.1"
  title: "OpenAPI-Generator PR 889"
basePath: "/v1"
paths:
  /one:
    get:
      operationId: "op1"
      parameters:
        - name: status
          in: query
          description: Some status value
          required: true
          type: string
          x-nullable: true
      responses:
        200:
          description: "success"

The extension x-nullable: true in the parameter is ignored.

openAPI.getPaths().get("/one").getGet().getParameters().get(0).getExtensions().size()

returns 0, should be 1.

If you reexport the parsed result you get:

openapi: 3.0.1
info:
  title: OpenAPI-Generator PR 889
  version: 1.0.1
servers:
- url: /v1
paths:
  /one:
    get:
      operationId: op1
      parameters:
      - name: status
        in: query
        description: Status values that need to be considered for filter
        required: true
        schema:
          type: string
          nullable: true
      responses:
        200:
          description: success
          content: {}
components: {}

[jmini]

Never mind, as you can see in the posted example, it works as expected.

x-nullable: true from the OASv2 Parameter is converted to OASv3:

  schema:
    type: string
    nullable: true