HelenOS sources

ui_ws_display      90 uspace/lib/ui/src/ui.c 			*ws = ui_ws_display;
ui_ws_display     103 uspace/lib/ui/src/ui.c 		*ws = ui_ws_display;
ui_ws_display     173 uspace/lib/ui/src/ui.c 	if (ws == ui_ws_display || ws == ui_ws_any) {
HelenOS homepage, sources at GitHub