docs: def output_json(data, code, headers=None):
      """Makes a Flask response with a JSON encoded body"""
  
      settings = current_app.config.get('RESTFUL_JSON', {})
  
      # If we're in debug mode, and the indent is not set, we set it to a
      # reasonable value here.  Note that this won't override any existing value
      # that was set.  We also set the "sort_keys" value.
      if current_app.debug:
          settings.setdefault('indent', 4)
          settings.setdefault('sort_keys', not PY3)
  
      # always end the json dumps with a new line
      # see https://github.com/mitsuhiko/flask/pull/1262
      dumped = dumps(data, **settings) + "\n"
  
      resp = make_response(dumped, code)
      resp.headers.extend(headers or {})
      return resp