class ActiveGrammarSet implements ScopedSetObserver<GrammarDocument> {

    public void addAll(final Collection<GrammarDocument> grams) {
        grammars.addAll(grams);
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("added " + grams.size()
                    + " grammar(s) - now containing " + grammars.size());
        }
    }

    public  ActiveGrammarSet(final ScopeObserver scopeObserver);

}