<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _setup_events(plugin):
 """ Handles setup or teardown of event hook registration for the provided plugin. `plugin` ``Plugin`` class. """


    events = plugin.events

    if events and isinstance(events, (list, tuple)):
        for event in [e for e in events if e in _EVENT_VALS]:
            register('event', event, plugin)