⚠️ Deprecated ⚠️

This is deprecated since version 4.10.

This API will be removed in GTK 5

Saves the @context state.

This allows temporary modifications done through method@Gtk.StyleContext.add_class, method@Gtk.StyleContext.remove_class, method@Gtk.StyleContext.set_state to be quickly reverted in one go through method@Gtk.StyleContext.restore.

The matching call to method@Gtk.StyleContext.restore must be done before GTK returns to the main loop.