@staticmethod<EOL><INDENT>def _get_average_time_stamp(action_set):<DEDENT>
<EOL>total_time_stamps = sum(rule.time_stamp * rule.numerosity<EOL>for rule in action_set)<EOL>total_numerosity = sum(rule.numerosity for rule in action_set)<EOL>return total_time_stamps / (total_numerosity or <NUM_LIT:1>)<EOL>
Return the average time stamp for the rules in this action
        set.