                  </p:column>
                                    <p:column headerText="Comments" >
                                        <h:outputLabel rendered="#{bb.refundedBill ne null}" value="#{bb.refundedBill.comments}" >
                                        </h:outputLabel>
                                        <h:outputLabel  rendered="#{bb.cancelledBill ne null}" value="#{bb.cancelledBill.comments}" >
                                        </h:outputLabel>
                           