diff --git a/Models/NullEditorDoc.php b/Models/NullEditorDoc.php
index 033e806..3f64f40 100755
--- a/Models/NullEditorDoc.php
+++ b/Models/NullEditorDoc.php
@@ -36,4 +36,12 @@ final class NullEditorDoc extends EditorDoc
         $this->id = $id;
         parent::__construct();
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function jsonSerialize() : mixed
+    {
+        return ['id' => $this->id];
+    }
 }
diff --git a/Models/NullEditorDocHistory.php b/Models/NullEditorDocHistory.php
index bf1914e..7f28121 100755
--- a/Models/NullEditorDocHistory.php
+++ b/Models/NullEditorDocHistory.php
@@ -36,4 +36,12 @@ final class NullEditorDocHistory extends EditorDocHistory
         $this->id = $id;
         parent::__construct();
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function jsonSerialize() : mixed
+    {
+        return ['id' => $this->id];
+    }
 }
diff --git a/Models/NullEditorDocType.php b/Models/NullEditorDocType.php
index d3f7d53..dc6498f 100755
--- a/Models/NullEditorDocType.php
+++ b/Models/NullEditorDocType.php
@@ -36,4 +36,12 @@ final class NullEditorDocType extends EditorDocType
         $this->id = $id;
         parent::__construct();
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function jsonSerialize() : mixed
+    {
+        return ['id' => $this->id];
+    }
 }
diff --git a/Models/NullEditorDocTypeL11n.php b/Models/NullEditorDocTypeL11n.php
index ba5d1a3..205f89a 100755
--- a/Models/NullEditorDocTypeL11n.php
+++ b/Models/NullEditorDocTypeL11n.php
@@ -36,4 +36,12 @@ final class NullEditorDocTypeL11n extends EditorDocTypeL11n
         $this->id = $id;
         parent::__construct();
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function jsonSerialize() : mixed
+    {
+        return ['id' => $this->id];
+    }
 }