code: def _validate(self):
          
  
          if self._state is not states.INITIAL:
              raise ValueError(obj=self._uid,
                               attribute='state',
                               expected_value=states.INITIAL,
                               actual_value=self._state)
  
          if not self._executable:
              raise MissingError(obj=self._uid,
                                 missing_attribute='executable')
docs: Purpose: Validate that the state of the task is 'DESCRIBED' and that an executable has been specified for the
          task.