gobject.Value should be implemented for components which either display a value from a bounded range, or which allow the user to specify a value from a bounded range, or both. For instance, most sliders and range controls, as well as dials, should have AtkObject representations which implement gobject.Value on the component's behalf. AtKValues may be read-only, in which case attempts to alter the value return would fail.
Undocumented in source.