                                action="#{billController.getPharamacyWholeSaleCreditBills}" ></p:commandButton>
                                <p:commandButton 
                                    ajax="false" 
                                    value="Excel" 
                                    icon="fas fa-file-excel"
                                    class="ui-button-success mx-2">
                                    <p:dataExporter type="xlsx" target="tbl" fileName="opd_bills"  />
                  