Hi, I am exporting excel using koolreport via array. That is running fine. Now I want to add one more sheet to in the same exported excel.
require_once "../koolreport/autoload.php";
class ExcelReport extends \koolreport\KoolReport
{
    use \koolreport\export\Exportable;
    use \koolreport\excel\ExcelExportable;
    public function settings()
    {
        return array(
            "dataSources"=>array(
                "data"=>array(
                    "class"=>'\koolreport\datasources\ArrayDataSource',
                    "data"=>$this->params["data"],
                    "dataFormat"=>"associate",
                )
            )
        );
    }   
    public function setup()
    {
        $this->src('data')
        ->pipe($this->dataStore('Billing'));
    }
}
$report = new ExcelReport(array(
			"data"=>$rpt_get_bill_list
		));
$report->run();
$report->exportToExcel(array(
		"dataStores" => array(
		    'Billing' => array(
			"columns"=>array(
				            )
				        )
				    )
				))->toBrowser("rpt_get_bill_list.xlsx");
Can anyone help me, how can I add another sheet ?