<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def complete(self):
 """ Returns whether or not this manager has reached a "completed" state. """

        if not self._techniques:
            return False
        if not any(tech._is_overriden('complete') for tech in self._techniques):
            return False
        return self.completion_mode(tech.complete(self) for tech in self._techniques if tech._is_overriden('complete'))