<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _on_automation_update(self, event):
 """Automation update broadcast from Abode SocketIO server."""

        event_group = TIMELINE.AUTOMATION_EDIT_GROUP

        if isinstance(event, (tuple, list)):
            event = event[0]

        for callback in self._event_callbacks.get(event_group, ()):
            _execute_callback(callback, event)