Restore helpers (#262)

app/Helpers/Csv/PostProcessing/PostProcessorInterface.php

@@ -0,0 +1,31 @@
+<?php
+/**
+ * PostProcessorInterface.php
+ * Copyright (C) 2016 thegrumpydictator@gmail.com
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+declare(strict_types = 1);
+namespace FireflyIII\Helpers\Csv\PostProcessing;
+
+
+/**
+ * Interface PostProcessorInterface
+ *
+ * @package FireflyIII\Helpers\Csv\PostProcessing
+ */
+interface PostProcessorInterface
+{
+
+    /**
+     * @return array
+     */
+    public function process(): array;
+
+    /**
+     * @param array $data
+     */
+    public function setData(array $data);
+}