title: Can I insert text from another file into my cloudformation template?
body: <p>I have this for example in my template:</p>
  
  <pre><code> ApiGatewayRestApi:
        Type: AWS::ApiGateway::RestApi
        Properties:
          Name: MyApi
          Description: My AWS API Gateway config
          Body:
            # INSERT swagger.yml content here
  </code></pre>
  
  <p>Is there some cloudformation function I can use to read swagger.yml in or attach it under "Body:"? So I can keep it in another file and my template doesn't become huge.</p>