A toggle associated with a specific group.
The ToggleGroup that this toggle has been added to, or null if the
toggle has not been added to a group.
Indicates if the IToggle is selected or not.
Indicates whether the control should respond when a user attempts to
interact with it. The appearance of the control may also be affected by
whether the control is enabled or disabled.
The following example disables a component:
component.enabled = false;
If the component has not yet initialized, initializes immediately. The
FeathersEvent.INITIALIZE event will be dispatched. To both initialize
and validate immediately, call validateNow() instead.