The type of callback function used for atk.component.Component.addFocusHandler and atk.component.Component.removeFocusHandler
Deprecated: Deprecated with atk.component.Component.addFocusHandler and atk.component.Component.removeFocusHandler. See those methods for more information.
The type of callback function used for atk.component.Component.addFocusHandler and atk.component.Component.removeFocusHandler