NilPortugues\Sql\QueryBuilder\Manipulation\Select::getAllOrderBy PHP Method

    public function getAllOrderBy()
    {
        return $this->orderBy;
    }

 /**
  * @param Select $select
  * @param array  $parts
  *
  * @return $this
  */
 protected function writeSelectOrderBy(Select $select, array &$parts)
 {
     $str = "";
     if (count($select->getAllOrderBy())) {
         $orderByArray = $select->getAllOrderBy();
         array_walk($orderByArray, function (&$orderBy) {
             $orderBy = $this->writeOrderBy($orderBy);
         });
         $str = "ORDER BY ";
         $str .= implode(", ", $orderByArray);
     }
     $parts = array_merge($parts, [$str]);
     return $this;
 }