Migrate RainLoop Webmail to use Facebook Graph API instead of FQL

rainloop/v/0.0.0/app/libraries/GuzzleHttp/Event/SubscriberInterface.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace GuzzleHttp\Event;
+
+/**
+ * SubscriberInterface provides an array of events to an
+ * EventEmitterInterface when it is registered. The emitter then binds the
+ * listeners specified by the EventSubscriber.
+ *
+ * This interface is based on the SubscriberInterface of the Symfony.
+ * @link https://github.com/symfony/symfony/tree/master/src/Symfony/Component/EventDispatcher
+ */
+interface SubscriberInterface
+{
+    /**
+     * Returns an array of event names this subscriber wants to listen to.
+     *
+     * The returned array keys MUST map to an event name. Each array value
+     * MUST be an array in which the first element is the name of a function
+     * on the EventSubscriber. The second element in the array is optional, and
+     * if specified, designates the event priority.
+     *
+     * For example:
+     *
+     *  - ['eventName' => ['methodName']]
+     *  - ['eventName' => ['methodName', $priority]]
+     *
+     * @return array
+     */
+    public function getEvents();
+}