From 66665cfb74fcb81bb3cd65a8799057f3217a061a Mon Sep 17 00:00:00 2001
From: Brice Lenfant <165644+bricel@users.noreply.github.com>
Date: Wed, 6 May 2020 21:38:55 +0300
Subject: [PATCH] Remove warning when sending empty array to multiple values
 properties.

Notice: Undefined variable: return in RestfulEntityBase->propertyValuesPreprocessText() (line 1142 of /modules/contrib/restful/plugins/restful/RestfulEntityBase.php).
---
 plugins/restful/RestfulEntityBase.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/plugins/restful/RestfulEntityBase.php b/plugins/restful/RestfulEntityBase.php
index 212697a5..700f8257 100644
--- a/plugins/restful/RestfulEntityBase.php
+++ b/plugins/restful/RestfulEntityBase.php
@@ -938,6 +938,10 @@ protected function propertyValuesPreprocessText($property_name, $value, $field_i
       );
     }
 
+    // In case the value is empty.
+    if (empty($value)) {
+      $return = [];
+    }
     // Multiple values.
     foreach ($value as $delta => $single_value) {
       if (!$instance['settings']['text_processing']) {