/**
* @param string $index
* @param null|array $properties
*
* @throws \PHPExcel_Exception
*/
public function startSheet($index, array $properties = null)
{
$this->sheetWrapper->start($index, $properties);
}
/**
* @param string $index
* @param null|array $properties
*
* @throws \PHPExcel_Exception
*/
public function startSheet($index, array $properties = null)
{
$this->sheetWrapper->start($index, $properties);
}
