def notify_event(self, session_info, topic):
try:<EOL><INDENT>self.event_bus.sendMessage(topic, items=session_info)<EOL><DEDENT>except AttributeError:<EOL><INDENT>msg = "<STR_LIT>".format(topic)<EOL>raise AttributeError(msg)<EOL><DEDENT>
:type identifiers:  SimpleIdentifierCollection