<?php
 
 namespace Illuminate\Contracts\Queue;
 
 interface QueueableCollection
 {
     /**
      * Get the type of the entities being queued.
      *
      * @return string|null
      */
     public function getQueueableClass();
 
     /**
      * Get the identifiers for all of the entities.
      *
      * @return array
      */
     public function getQueueableIds();
 
     /**
      * Get the relationships of the entities being queued.
      *
      * @return array
      */
     public function getQueueableRelations();
 
     /**
      * Get the connection of the entities being queued.
      *
      * @return string|null
      */
     public function getQueueableConnection();
 }