/**
* @param string $property_name valid: timestamp, exists, content
* @return mixed
* @throws SmartyException if $property_name is not valid
*/
public function __get($property_name)
{
switch ($property_name) {
case 'timestamp':
case 'exists':
$this->handler->populateTimestamp($this);
return $this->exists;
default:
throw new SmartyException("source property '{$property_name}' does not exist.");
}
}
