gtk/window.go
func (v *Window) IsActive() bool {
	c := C.gtk_window_is_active(v.native())
	return gobool(c)
}
func (v *Window) IsActive() bool {
	c := C.gtk_window_is_active(v.native())
	return gobool(c)
}
// IsActive is a wrapper around gtk_window_is_active().