Added missing interface.

plugins/woocommerce-admin/includes/interfaces/class-wc-reports-data-store-interface.php

@@ -0,0 +1,26 @@
+<?php
+/**
+ * Reports Data Store Interface
+ *
+ * @version  3.5.0
+ * @package  WooCommerce/Interface
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * WooCommerce Reports data store interface.
+ *
+ */
+interface WC_Admin_Reports_Data_Store_Interface {
+
+	/**
+	 * Get the data based on args.
+	 *
+	 * @param array $args Query parameters.
+	 * @return stdClass|WP_Error
+	 */
+	public function get_data( $args );
+}