Reveals or conceals the content of the action bar.
Note: this does not show or hide action_bar in the gtk.widget.Widget.gboolean sense, so revealing has no effect if the action bar is hidden.
The new value of the property
Reveals or conceals the content of the action bar.
Note: this does not show or hide action_bar in the gtk.widget.Widget.gboolean sense, so revealing has no effect if the action bar is hidden.