            <p:outputLabel value="#{d.billItem.bill.deptId}" />
                    </p:column>

                    <p:column headerText="Billed Bill No"
                              sortBy="#{d.billItem.bill.billedBill.deptId}" 
                              filterBy="#{d.billItem.bill.billedBill.deptId}"
                              filterMatchMode="contains">
                        <f:facet name="header">
                            <p:outputLabel value="Billed Bill No"/>
                        </f: