public function setOrderSequence($orderSequence) {
        if (false === in_array($orderSequence, DataTablesEnumerator::enumOrderSequences())) {
            $orderSequence = null;
        }
        $this->orderSequence = $orderSequence;
        return $this;
    }
public function setOrderSequence($orderSequence) {
        if (false === in_array($orderSequence, DataTablesEnumerator::enumOrderSequences())) {
            $orderSequence = null;
        }
        $this->orderSequence = $orderSequence;
        return $this;
    }
public function setOrderSequence ( $ orderSequence ) { if ( false === in_array ( $ orderSequence , DataTablesEnumerator :: enumOrderSequences ( ) ) ) { $ orderSequence = null ; } $ this -> orderSequence = $ orderSequence ; return $ this ; }
Set the order sequence.

@param string $orderSequence The order sequence.
@return DataTablesColumnInterface Returns this column.
Set the order sequence .