code: func (v *Display) NotifyStartupComplete(startupID string) {
  	cstr := C.CString(startupID)
  	defer C.free(unsafe.Pointer(cstr))
  	C.gdk_display_notify_startup_complete(v.native(), (*C.gchar)(cstr))
  }
docs: // NotifyStartupComplete() is a wrapper around gdk_display_notify_startup_complete().