code: static function getAvailableExtNames()
      {
          $files = pakeFinder::type( 'file' )->name( 'options-*.yaml' )->not_name( 'options-sample.yaml' )->not_name( 'options-user.yaml' )->maxdepth( 0 )->in( self::getOptionsDir() );
          foreach ( $files as $i => $file )
          {
              $files[$i] = substr( basename( $file ), 8, -5 );
          }
          return $files;
      }
docs: Returns the list of extensions for which we have a config file available
  @return array