Demonstrating reusing a Swagger operation definition for multiple paths

swagger.yaml

swagger: "2.0"
info:
  version: "1.0.0"
  title: CORS demo
  description: Demonstrating reusing an operation definition for multiple paths
definitions:
  CORS:
    summary: CORS Preflight request
    tags: [CORS]
    responses:
      200:
        description: Returns the CORS response headers
        headers:
          Access-Control-Allow-Origin:
            type: string
          Access-Control-Allow-Credentials:
            type: boolean
          Access-Control-Allow-Headers:
            type: array
            collectionFormat: csv
          Access-Control-Allow-Methods:
            type: array
            collectionFormat: csv
          Access-Control-Max-Age:
            type: integer
paths:
  /accounts:
    options:
      $ref: CORS
  /products:
    options:
      $ref: CORS
  /settings:
    options:
      $ref: CORS