                         <p:commandButton class="ui-button-info mx-2" icon="fas fa-print" value="Print" ajax="false" action="#" >
                                <p:printer target="gpBillPreview" ></p:printer>
                            </p:commandButton>
                            <p:commandButton class="ui-button-success" icon="fas fa-file-excel" ajax="false" value="Excel" >
                                <p:dataExporter type="xlsx" target="tbl" fileName="Detailed_Transfer_Listing"  />
                