/**
  * Recursively search route config to find those route names that reference a prismic mask/type
  * @param  array  $routes
  * @param  string $parent
  * @return array
  */
 protected function findRoutesReferencedToMasks(array $routes, $parent = '')
 {
     $searchParam = $this->routerOptions->getMaskParam();
     $out = array();
     foreach ($routes as $name => $route) {
         $fqrn = trim($parent . '/' . $name, '/');
         $maskName = isset($route['options']['defaults'][$searchParam]) ? $route['options']['defaults'][$searchParam] : NULL;
         if (!empty($maskName)) {
             $out[$maskName] = $fqrn;
         }
         if (isset($route['child_routes']) && count($route['child_routes'])) {
             $out = array_merge($out, $this->findRoutesReferencedToMasks($route['child_routes'], $name));
         }
     }
     return $out;
 }
 /**
  * Return the document UID from the current matched route
  * @return string|NULL
  */
 public function getDocumentUidFromRoute()
 {
     $params = $this->getController()->plugin('params');
     $search = $this->routerOptions->getUidParam();
     return $params->fromRoute($search);
 }