only in patch2:
unchanged:
--- /dev/null
+++ b/src/Plugin/Layout/FieldLayoutTestPlugin.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace Drupal\paragraphs\Plugin\Layout;
+
+use Drupal\Core\Layout\LayoutDefault;
+
+/**
+ *
+ * @Layout(
+ *   id = "behavior_regions",
+ *   label = @Translation("Behavior regions"),
+ *   category = @Translation("Paragraphs"),
+ *   description = @Translation("Paragraphs behavior regions."),
+ *   regions = {
+ *     "content" = {
+ *       "label" = @Translation("Content")
+ *     },
+ *     "behavior" = {
+ *       "label" = @Translation("Behavior")
+ *     }
+ *   },
+ *   config_dependencies = {
+ *     "module" = {
+ *       "paragraphs",
+ *     },
+ *   },
+ * )
+ */
+class FieldLayoutTestPlugin extends LayoutDefault {
+
+}