docs: def on_content_type(handlers, default=None, error='The requested content type does not match any of those allowed'):
      """Returns a content in a different format based on the clients provided content type,
         should pass in a dict with the following format:
  
              {'[content-type]': action,
               ...
              }
      """
      def output_type(data, request, response):
          handler = handlers.get(request.content_type.split(';')[0], default)
          if not handler:
              raise falcon.HTTPNotAcceptable(error)
  
          response.content_type = handler.content_type
          return handler(data, request=request, response=response)
      output_type.__doc__ = 'Supports any of the following formats: {0}'.format(', '.join(
          function.__doc__ or function.__name__ for function in handlers.values()))
      output_type.content_type = ', '.join(handlers.keys())
      return output_type