n="fas fa-print" 
                                        ajax="false" 
                                        action="#" >
                                        <p:printer target="gpBillPreview" ></p:printer>
                                    </p:commandButton>
                                </div>
                            </div>

                        </f:facet>

                        <h:panelGroup id="gpBillPreview" class="d-flex justify-content-center">
                            <h:panelG