TaskProvider::makeOrderBy

private function makeOrderBy(): self
{
	DelDuplicateSort($this->arSqlOrder);
	for ($i = 0, $arSqlOrderCnt = count($this->arSqlOrder); $i < $arSqlOrderCnt; $i++)
	{
		if ($i == 0)
		{
			$this->strSqlOrder = " ORDER BY ";
		}
		else
		{
			$this->strSqlOrder .= ",";
		}

		$this->strSqlOrder .= $this->arSqlOrder[$i];
	}

	return $this;
}