rem: Layer *GetRootLayer(int32 workspace=B_CURRENT_WORKSPACE, screen_id screen=B_MAIN_SCREEN_ID)
add: Layer *GetRootLayer(int32 workspace, screen_id screen)
context: Layer *GetRootLayer(int32 workspace=B_CURRENT_WORKSPACE, screen_id screen=B_MAIN_SCREEN_ID){	lock_workspaces();	lock_layers();	Layer *r=desktop_private::activescreen->GetRootLayer();	unlock_layers();	unlock_workspaces();	return r;}