update~{className c} :: forall (m :: * -> *). 
    (MonadLogger m, MonadIO m, MonadThrow m, MonadBaseControl IO m) => 
    [[~{className c}InstanceFilterType]] -> [~{className c}InstanceUpdateType] -> SqlPersistT m ()
update~{className c} filters updates = do
~{indent 4 $ concatMap updateEntity es}
    return ()