code: def execute(self, driver_command, params=None):
          
          if self.session_id is not None:
              if not params:
                  params = {'sessionId': self.session_id}
              elif 'sessionId' not in params:
                  params['sessionId'] = self.session_id
  
          params = self._wrap_value(params)
          response = self.command_executor.execute(driver_command, params)
          if response:
              self.error_handler.check_response(response)
              response['value'] = self._unwrap_value(
                  response.get('value', None))
              return response
          # If the server doesn't send a response, assume the command was
          # a success
          return {'success': 0, 'value': None, 'sessionId': self.session_id}
docs: Sends a command to be executed by a command.CommandExecutor.
  
          :Args:
           - driver_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.