p:commandButton class="ui-button-success mx-2" icon="fas fa-file-excel" id="btnExcel" ajax="false" value="Excel" >
                                <p:dataExporter fileName="Bill Types" type="xlsx" target="tbl" ></p:dataExporter>
                            </p:commandButton>
                        </h:panelGrid>


                        <div style="width: 100%; overflow-x: auto;">
                            <p:dataTable 
                                rowIndexVar="i" 
                                id=