deferred class
	EV_TAB_CONTROLABLE

General
	cluster: interface
	description: "Abstraction for objects that may have their ability to be tabbed to enabled/disabled."
	keywords: "select, selected, selectable"

Ancestors
	EV_ANY*

Queries
	data: ANY
	is_destroyed: BOOLEAN
	is_tabable_from: BOOLEAN
	is_tabable_to: BOOLEAN

Commands
	copy (other: [like Current] EV_TAB_CONTROLABLE)
	destroy
	disable_tabable_from
	disable_tabable_to
	enable_tabable_from
	enable_tabable_to
	set_data (some_data: [like data] ANY)