/**
* Gets a label by field name.
*
* @param string $name The field name (required - the default value is here because PHP do not allow signature changes with inheritance)
*
* @return string The label name or an empty string if it is not defined
*/
public function getLabel($name = null)
{
if (1 == func_num_args()) {
if (!isset($this->fields[$name])) {
throw new InvalidArgumentException(sprintf('Unable to get the label on an unexistant widget ("%s").', $name));
}
return $this->fields[$name]->getLabel();
} else {
// label for this widget schema
return parent::getLabel();
}
}