mountComponent(rootID, transaction, context) {
        this._rootNodeID = rootID;

        const node = this.mountNode(ReactWWIDOperations.getParent(rootID), this._currentElement, transaction);

        ReactWWIDOperations.add(rootID, node);

        // Mounting children
        let childrenToUse = this._currentElement.props.children;
        childrenToUse = childrenToUse === null ? [] : [].concat(childrenToUse);

        if (childrenToUse.length) {
            this.mountChildren(childrenToUse, transaction, context);
        }

        // Rendering the rootNode
        ReactWWIDOperations.rootNode.render();
        return this;
    }
Mounting the root component.

@internal
@param  {string} rootID - The root ID for this node.
@param  {ReactReconcileTransaction} transaction
@param  {object} context