add missing (dummy) methods to yaml file persistence
add missing (dummy) methods to yaml file persistence

maZahaca/LiipTranslationBundle,aitboudad/LiipTranslationBundle,aitboudad/LiipTranslationBundle,liip/LiipTranslationBundle,aitboudad/LiipTranslationBundle,maZahaca/LiipTranslationBundle,maZahaca/LiipTranslationBundle,liip/LiipTranslationBundle,liip/LiipTranslationBundle