/**
* Retrieves the data for a given key from the FE user session. Returns an
* empty string if no data for that key is stored.
*
* @param mixed $unused (unused)
* @param array $parameters
* the contents of the "params" child of the userobj node as key/value pairs
* (used for retrieving the current form field name)
*
* @return string the data stored in the FE user session under the given key, might be empty
*/
public function retrieveDataFromSession($unused, array $parameters)
{
return tx_oelib_Session::getInstance(tx_oelib_Session::TYPE_USER)->getAsString($this->prefixId . '_' . $parameters['key']);
}
