Import another yaml file

Hello! Thanks for this useful library. I want to import another yaml file in my swagger specification. For example i have a file named username_definitions.yml. Now i want to import bad_request.yml to specify a “bad request” response.

How can i do something like that? If there is no way, will it good idea to implement an import property myself?

username_definitions.yml

This is the summary defined in yaml file
First line is the summary
All following lines until the hyphens is added to description
the format of the first lines until 3 hyphens will be not yaml compliant
but everything below the 3 hyphens should be.
---
tags:
  - users
parameters:
  - in: path
    name: username
    type: string
    required: true
responses:
  200:
    description: A single user item
    schema:
      id: rec_username
      properties:
        username:
          type: string
          description: The name of the user
          default: 'steve-harris'

  import: "bad_request.yml" 

bad_request.yml

400:
  description: Bad request

[rochacbruno]

Merged thanks!

[AminHP]

Please check my pull request. @rochacbruno