code: def _execute(self, command, params=None):
          
          if not params:
              params = {}
          params['id'] = self._id
          return self._parent.execute(command, params)
docs: Executes a command against the underlying HTML element.
  
          Args:
            command: The name of the command to _execute as a string.
            params: A dictionary of named parameters to send with the command.
  
          Returns:
            The command's JSON response loaded into a dictionary object.