/**
*
* Checks if a data key is set.
*
* @param string $key The requested data key.
*
* @return void
*
*/
public function __isset($key)
{
// if an accessor method exists, use it
if (!empty($this->_access_methods[$key]['isset'])) {
// use accessor method
$method = $this->_access_methods[$key]['isset'];
$result = $this->{$method}();
} else {
// no accessor method; use parent method
$result = parent::__isset($key);
}
// done
return $result;
}
