name : StoppableEventInterface.php <?php declare(strict_types=1); namespace Psr\EventDispatcher; /** * An Event whose processing may be interrupted when the event has been handled. * * A Dispatcher implementation MUST check to determine if an Event * is marked as stopped after each listener is called. If it is then it should * return immediately without calling any further Listeners. */ interface StoppableEventInterface { /** * Is propagation stopped? * * This will typically only be used by the Dispatcher to determine if the * previous listener halted propagation. * * @return bool * True if the Event is complete and no further listeners should be called. * False to continue calling listeners. */ public function isPropagationStopped() : bool; }