MINOR,FEAT: return parent if child is undefined to allow empty method stubs

src/componentAncestry/wrapperComponent.js

@@ -189,6 +189,8 @@ class ChildbearerComponent extends ElementWrapper {
      * @returns {Component} this component object
      */
     childContext(component) {
+        if (!component) return this;
+        
         if (arguments.length > 1) {
             for (let i = 0; i < arguments.length; i++) {
                 this.childContext(arguments[i]);