def next_event_description(self):
if self._departures[<NUM_LIT:0>]._time < self._arrivals[<NUM_LIT:0>]._time:<EOL><INDENT>return <NUM_LIT:2><EOL><DEDENT>elif self._arrivals[<NUM_LIT:0>]._time < infty:<EOL><INDENT>return <NUM_LIT:1><EOL><DEDENT>else:<EOL><INDENT>return <NUM_LIT:0><EOL><DEDENT>
Returns an integer representing whether the next event is
        an arrival, a departure, or nothing.

        Returns
        -------
        out : int
            An integer representing whether the next event is an
            arrival or a departure: ``1`` corresponds to an arrival,
            ``2`` corresponds to a departure, and ``0`` corresponds to
            nothing scheduled to occur.