add nova

nova/src/SupportsPolling.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Laravel\Nova;
+
+trait SupportsPolling
+{
+    /**
+     * Indicates whether the resource should automatically poll for new resources.
+     *
+     * @var bool
+     */
+    public static $polling = false;
+
+    /**
+     * The interval at which Nova should poll for new resources.
+     *
+     * @var int
+     */
+    public static $pollingInterval = 15;
+
+    /**
+     * Indicates whether to show the polling toggle button inside Nova.
+     *
+     * @var bool
+     */
+    public static $showPollingToggle = false;
+}