handle<studio::Instance>::cast_static(get_canvas_interface()->get_instance())->
add_actions_to_group(action_group_, ui_info, param_list, synfigapp::Action::CATEGORY_LAYER);
handle<studio::Instance>::cast_static(get_canvas_interface()->get_instance())->
add_actions_to_group(action_group_, ui_info, param_list, synfigapp::Action::CATEGORY_LAYER);