diff --git a/.github/workflows/labeler.yml b/.github/workflows/labeler.yml
index 673125d7a..de3cbbee1 100644
--- a/.github/workflows/labeler.yml
+++ b/.github/workflows/labeler.yml
@@ -6,6 +6,6 @@ jobs:
     triage:
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/labeler@main
+            - uses: actions/labeler@v4
               with:
                   repo-token: '${{ secrets.GITHUB_TOKEN }}'
diff --git a/projects/js-toolkit/packages/js-api/editor/index.ts b/projects/js-toolkit/packages/js-api/editor/index.ts
new file mode 100644
index 000000000..ac73ee10a
--- /dev/null
+++ b/projects/js-toolkit/packages/js-api/editor/index.ts
@@ -0,0 +1,19 @@
+/**
+ * SPDX-FileCopyrightText: © 2020 Liferay, Inc. <https://liferay.com>
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ */
+
+/**
+ * Editor Transformer
+ *
+ * For CKEditor 4, see config API:
+ * https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html
+ */
+
+export interface EditorConfigTransformer<T> {
+	(args: T): T;
+}
+
+export interface EditorTransformer<T> {
+	editorConfigTransformer: EditorConfigTransformer<T>;
+}