code: def get_command_history(self, issued_command):
          
          #pylint: disable=protected-access
          entry = issued_command._proto.commandQueueEntry
          key = self._cache_key(entry.cmdId)
          if key in self._cache:
              return self._cache[key]
          return None
docs: Gets locally cached CommandHistory for the specified command.
  
          :param .IssuedCommand issued_command: object representing a
                                                previously issued command.
          :rtype: .CommandHistory