@Override
    public String lastId(final RootDocument rootDocument) {
        return lastId(mongoTemplate, FamilyDocumentMongo.class,
                rootDocument.getFilename(), "F");
    }
@ Override public String lastId ( final RootDocument rootDocument ) { return lastId ( mongoTemplate , FamilyDocumentMongo . class , rootDocument . getFilename ( ) , "F" ) ; }
{@inheritDoc}