:column width="8em" headerText="Bill No" style=" text-align: center;">
                                    <p:commandLink
                                        id="billNo"
                                        disabled ="#{row.bill.billTypeAtomic eq 'PROFESSIONAL_PAYMENT_FOR_STAFF_FOR_CHANNELING_SERVICE_SESSION' 
                                                     or row.bill.billTypeAtomic eq 'PROFESSIONAL_PAYMENT_FOR_STAFF_FOR_CHANNELING_SERVICE_RETURN'
                                               