delete broadcast events that are missing models by default

Author: taylorotwell

src/Illuminate/Broadcasting/BroadcastEvent.php

@@ -50,6 +50,13 @@ class BroadcastEvent implements ShouldQueue
      */
     public $maxExceptions;
 
+    /**
+     * Delete the job if its models no longer exist.
+     *
+     * @var bool
+     */
+    public $deleteWhenMissingModels = true;
+
     /**
      * Create a new job handler instance.
      *