func (v *GLContext) GetSurface() (*Window, error) {
	c := C.gdk_gl_context_get_window(v.native())
	if c == nil {
		return nil, nilPtrErr
	}

	return &Window{glib.Take(unsafe.Pointer(c))}, nil
}
func (v *GLContext) GetSurface() (*Window, error) {
	c := C.gdk_gl_context_get_window(v.native())
	if c == nil {
		return nil, nilPtrErr
	}

	return &Window{glib.Take(unsafe.Pointer(c))}, nil
}
// GetWindow is a wrapper around gdk_gl_context_get_window().