/**
* Init a new sheet.
*
* @param $title
* @param Closure $callback
*
* @return Sheet
*/
public function sheet($title, Closure $callback = null)
{
// Init a new sheet
$sheet = new Sheet($this, $title, null, $this->driver);
// Preform callback on the sheet
$sheet->call($callback);
// Add the sheet to the collection
$this->addSheet($sheet);
return $sheet;
}
