code: public function possibleIcons()
      {
          $path = Yii::getAlias("@vendor/fortawesome/font-awesome/src/icons.yml");
          $data = \Spyc::YAMLLoad($path);
          $icons = [];
          ArrayHelper::multisort($data['icons'], 'name');
          foreach ($data['icons'] as $icon) {
              $group = $icon['categories'][0];
              if (!isset($icons[$group])) {
                  $icons[$group] = [];
              }
              $icons[$group]['fa fa-' . $icon['id']] = $icon['name'] . "&#09;" . '&#x' . $icon['unicode'] . ';';
          }
          ksort($icons);
  
          return $icons;
      }
docs: [[@doctodo method_description:possibleIcons]].
  
  @return [[@doctodo return_type:possibleIcons]] [[@doctodo return_description:possibleIcons]]