SassList::nth PHP Метод

    public function nth($i)
    {
        $i = $i - 1;
        # SASS uses 1-offset arrays
        if (isset($this->value[$i])) {
            return $this->value[$i];
        }
        return new SassBoolean(false);
    }

 /**
  * Returns the nth value ofthe $list
  * @param SassList - the list to get from
  * @param SassNumber - the value to get
  * @return anything
  */
 public static function nth($list, $n)
 {
     SassLiteral::assertType($n, 'SassNumber');
     if ($list instanceof SassString) {
         $list = new SassList($list->toString());
     }
     return $list->nth($n->value);
 }