Multiple response schemas fail

[shuat]

responses:
        "200":
          description: Success
          schema:
            oneOf:
              - $ref: "#/definitions/UserWithInt"
              - $ref: "#/definitions/UserWithString"

I get the following error

{ errors:
   [ { code: 'ONE_OF_MISSING',
       message: 'Not a valid response definition',
       path: [Array],
       inner: [Array] } ],
  warnings: [] }

However according to swagger specs this should be allowed.

[theganyo]

This would be an error in the OpenAPI library being used: https://github.com/apigee-127/sway. I'd check there to see if it's a known issue and report it there if not.