only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/node/config/schema/node.destination.schema.yml
@@ -0,0 +1,7 @@
+migrate.destination.entity:node:
+  type: migrate_destination
+  label: 'Node'
+  mapping:
+    language_property:
+      type: string
+      label: 'Language property'