code: def parameter_converter(*convert_types):
      '''
      Decorator that denotes a function as a url parameter converter.
      '''
      def inner(func):
          for ct in convert_types:
              ParameterConverter._register_converter(func, ct)
          return func
      return innef parameter_converter(*convert_types):
      '''
      Decorator that denotes a function as a url parameter converter.
      '''
      def inner(func):
          for ct in convert_types:
              ParameterConverter._register_converter(func, ct)
          return func
      return inner
docs: Decorator that denotes a function as a url parameter converter.