the latest code

vendor/laravel/framework/src/Illuminate/Broadcasting/InteractsWithBroadcasting.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace Illuminate\Broadcasting;
+
+use Illuminate\Support\Arr;
+
+use function Illuminate\Support\enum_value;
+
+trait InteractsWithBroadcasting
+{
+    /**
+     * The broadcaster connection to use to broadcast the event.
+     *
+     * @var array
+     */
+    protected $broadcastConnection = [null];
+
+    /**
+     * Broadcast the event using a specific broadcaster.
+     *
+     * @param  \UnitEnum|array|string|null  $connection
+     * @return $this
+     */
+    public function broadcastVia($connection = null)
+    {
+        $connection = enum_value($connection);
+
+        $this->broadcastConnection = is_null($connection)
+            ? [null]
+            : Arr::wrap($connection);
+
+        return $this;
+    }
+
+    /**
+     * Get the broadcaster connections the event should be broadcast on.
+     *
+     * @return array
+     */
+    public function broadcastConnections()
+    {
+        return $this->broadcastConnection;
+    }
+}