gtk/window.go
func (v *Window) SetGravity(gravity gdk.GdkGravity) {
	C.gtk_window_set_gravity(v.native(), C.GdkGravity(gravity))
}
func (v *Window) SetGravity(gravity gdk.GdkGravity) {
	C.gtk_window_set_gravity(v.native(), C.GdkGravity(gravity))
}
// TODO(jrick) GdkGeometry GdkWindowHints.
/*
func (v *Window) SetGeometryHints() {
}
*/
// SetGravity is a wrapper around gtk_window_set_gravity().