Merged in feature/MAW-855-import-code-into-aws (pull request #2)

code import from pantheon

* code import from pantheon

wp/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-payment-gateway.php

@@ -376,7 +376,7 @@ abstract class WC_Payment_Gateway extends WC_Settings_API {
 	 * @param  int        $order_id Order ID.
 	 * @param  float|null $amount Refund amount.
 	 * @param  string     $reason Refund reason.
-	 * @return boolean True or false based on success, or a WP_Error object.
+	 * @return bool|\WP_Error True or false based on success, or a WP_Error object.
 	 */
 	public function process_refund( $order_id, $amount = null, $reason = '' ) {
 		return false;