public function setBurnafterreading($burnafterreading = '1')
{
if ($burnafterreading === '0') {
$this->_data->meta->burnafterreading = false;
} else {
if ($burnafterreading !== '1') {
throw new Exception('Invalid data.', 73);
}
$this->_data->meta->burnafterreading = true;
$this->_data->meta->opendiscussion = false;
}
}