diff --git a/AppBuilder/ABFactory.js b/AppBuilder/ABFactory.js
index 6d2cca2a..44a6cbfc 100644
--- a/AppBuilder/ABFactory.js
+++ b/AppBuilder/ABFactory.js
@@ -885,6 +885,12 @@ class ABFactory extends ABFactoryCore {
       return _.cloneDeep(value);
    }
 
+   /**
+    * implements the _.defaultsDeep function
+    * @param {object} target
+    * @param {object} source
+    * @returns {object} the merged object
+    */
    defaultsDeep(target, source) {
       return _.defaultsDeep(target, source);
    }