minimal example for https://github.com/swagger-api/swagger-codegen/issues/5460

5460.yaml

swagger: "2.0"

info:
  title: "https://github.com/swagger-api/swagger-codegen/issues/5460"
basePath: "/0"
schemes:
- "https"
- "http"
paths:
  /test/:
    get:
      responses:
        "200":
          schema:
            $ref: "#/definitions/Response"
        "404":
          description: "allele_id does not exist"

definitions:
  Def1:
    type: "string"
    example: word
  Def2:
    type: "string"
    example: two words
  Def3:
    type: "string"
    example: "quotedword"
  Def4:
    type: "string"
    example: "two quoted words"
  Def5:
    type: "object"
    properties:
      namespace:
        type: "string"
        example: "NCBI"
      accession:
        type: "string"
        example: "ENST000001234.5"
  Response:
    type: "object"
    properties:
      d1:
        $ref: "#/definitions/Def1"
      d2:
        $ref: "#/definitions/Def2"
      d3:
        $ref: "#/definitions/Def3"
      d4:
        $ref: "#/definitions/Def4"
      d5:
        $ref: "#/definitions/Def5"