- /**
- * Check if config data value was changed
- * @todo this method should be make as protected
- * @return bool
- */
- public function isValueChanged();
-
- /**
- * Get old value from existing config
- *
- * @return string
- */
- public function getOldValue();
-
- /**
- * Get value by key for new user data from <section>/groups/<group>/fields/<field>
- *
- * @param string $key
- * @return string
- */
- public function getFieldsetDataValue($key);