code: def set_renamed_input_fields(self, renamed_input_fields):
          
          if not (isinstance(renamed_input_fields, basestring) or
                  isinstance(renamed_input_fields, ListType)):
              raise ValueError("renamed_input_fields must be a string or a list")
          self.renamed_input_fields = renamed_input_fields
          return self
docs: This method expects a scalar string or a list of input_fields
          to