public function onTwigTemplatePaths()
{
$twig_paths = [];
$this->grav->fireEvent('onAdminTwigTemplatePaths', new Event(['paths' => &$twig_paths]));
$twig_paths[] = __DIR__ . '/themes/' . $this->theme . '/templates';
$this->grav['twig']->twig_paths = $twig_paths;
}