added php download of membershipments

vendor/illuminate/contracts/Pipeline/Hub.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace Illuminate\Contracts\Pipeline;
+
+interface Hub
+{
+    /**
+     * Send an object through one of the available pipelines.
+     *
+     * @param  mixed  $object
+     * @param  string|null  $pipeline
+     * @return mixed
+     */
+    public function pipe($object, $pipeline = null);
+}