#{content} $maybe (((_, modifyView), modifyEnctype), modifyTranss, ((_, addTransView), addTransEnctype)) <- forms _{MsgSystemMessageEdit} ^{modifyView} _{MsgSystemMessageAddTranslation} ^{addTransView} $if not (null modifyTranss) _{MsgSystemMessageEditTranslations} $forall ((_, transView), transEnctype) <- modifyTranss ^{transView}