Returns the specified Component object. This member is static and can be invoked without creating an instance of the class.
Use the findComponent method to get a reference to a Component object that has been registered with the application through the addComponent method. If parent is not specified, the search is limited to top-level components. If parent represents a Component object, the search is limited to children of the specified component. If parent is a DOM element, the search is limited to child components of the specified element.
The findComponent method can also be invoked by using the $find shortcut method.