'Get auth events for given event_ids. The events *must* be state events.
Args:
event_ids (list): state events
include_given (bool): include the given events in result
Returns:
list of events'

def get_auth_chain(self, event_ids, include_given=False):

    return self.get_auth_chain_ids(event_ids, include_given=include_given).addCallback(self._get_events)
