Ax2012 generate number sequence

 Below is the code for generate number sequence :-

    NumberSeq       NumberSeq;
    NumberSequenceTable     numberSequenceTableNum;
    ;

    //NumberSeq = NumberSeq::newGetNum(PurchParameters::numRefShipInfoSeqCode(),true,False);
    numberSequenceTableNum = NumberSequenceTable::findByNaturalKey("SHIP");//find(5637147045);

    numberSeq = NumberSeq::newFromParameters(numberSequenceTableNum.Continuous);

    numberSeq.parmNumberSequenceCode(numberSequenceTableNum.NumberSequence);
    numberSeq.parmNumberSequenceId(numberSequenceTableNum.RecId);
    numberSeq.parmNumTableNum(numberSequenceTableNum);
    numberSeq.parmMakeDecisionLater(false);

    //NumberSeq.used();
    return  numberSeq.num();