/**
* Register an event handler
*
* @param Mixed $event The event to register
* @param EventHandler $handler The EventHandler in charge of the event.
*/
static function register($event, EventHandler $handler)
{
if (!arr::hasKey(self::$_handlers, strtolower($event))) {
self::$_handlers[$event] = array();
}
self::$_handlers[$event][$handler->getUniqueId()] = $handler;
}
