code: def executed_without_callbacks(self):
          
          T = self.tm.trace
          if T: T.write(self.trace_message('Task.executed_without_callbacks()',
                                           self.node))
  
          for t in self.targets:
              if t.get_state() == NODE_EXECUTING:
                  for side_effect in t.side_effects:
                      side_effect.set_state(NODE_NO_STATE)
                  t.set_state(NODE_EXECUTED)
docs: Called when the task has been successfully executed
          and the Taskmaster instance doesn't want to call
          the Node's callback methods.