System events: YES.
System component. You can create other instances of this class, but note that the reorganize prototype method is specifically designed to manage window tabs, and therefore the new instance should define its proper organization method.
Invoked on addition and removal of window tabs. You don't need to invoke this method explicitly.
this inherits the properties specified in object; prototype properties specified in object are overridden. Creates elements. Returns this.
String. If not passed to the constructor, gets a generated XML name (Class).
If specified, designates the owner object.