parameters: (self, key)
docstring: r"""
          A helper method that records a backward metric
          for the given key. A user should call this after
          .backward().
          Args:
              key (str): unique id for metric within a group
docstring_summary: r"""
          A helper method that records a backward metric
          for the given key. A user should call this after
          .backward().
          Args:
              key (str): unique id for metric within a group
docstring_tokens: r A helper method that records a backward metric for the given key . A user should call this after . backward () . Args : key ( str ) : unique id for metric within a group
function: def record_backward_end(self, key):
          r"""
          A helper method that records a backward metric
          for the given key. A user should call this after
          .backward().
          Args:
              key (str): unique id for metric within a group
          """
          self.__metrics_logger.record_end(
              self.BACKWARD_METRIC,
              key
          )
function_tokens: def record_backward_end ( self , key ) : self . __metrics_logger . record_end ( self . BACKWARD_METRIC , key )