def add(self, task_name: str, greenlet: gevent.Greenlet) -> None:
greenlet.link_exception(self._handle_killed_greenlets)
greenlet.task_name = task_name
self.greenlets.append(greenlet)
def add(self, task_name: str, greenlet: gevent.Greenlet,
exception_is_error: bool) -> None:
greenlet.link_exception(self._handle_killed_greenlets)
greenlet.task_name = task_name
greenlet.exception_is_error = exception_is_error
self.greenlets.append(greenlet)
