When headers are referenced using the $ref invalid type is generated

[DefCon-007]

If a header is referenced using the $ref and it points to the parameters of a different request, then the generated type for the corresponding header is invalid.

To test, following test schema can be used. Here type for Content-Type in RequestBHeaders will be N0 which should be string.

openapi: 3.0.3
info:
  title: Example API
  version: 1.0.0
paths:
  /requestA:
    post:
      summary: Request A
      operationId: requestA
      parameters:
        - name: Content-Type
          in: header
          description: Specifies the content type of your request. Should always be set to application/json if a body is provided.
          schema:
            description: The expected content type.
            type: string
            pattern: ^application\/json$
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                message:
                  type: string
      responses:
        '200':
          description: Successful response

  /requestB:
    post:
      summary: Request B
      operationId: requestB
      parameters:
        - $ref: "#/paths/~1requestA/post/parameters/0"
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                status:
                  type: string
      responses:
        '200':
          description: Successful response