swagger: 2.0
info:
  title: OpenAPI 2.0 body response text plain example
  version: 1
paths:
  /foo:
    post:
      consumes:
        - text/plain
      produces:
        - text/plain
      parameters:
        - name: body
          in: body
          required: true
          schema:
            type: string
      responses:
        '200':
          description: OK
          schema:
            type: string