private void addNewGrammarLocations(SchemaGrammar srcGrammar, SchemaGrammar dstGrammar) {
        final StringList locations = srcGrammar.getDocumentLocations();
        final int locSize = locations.size();
        final StringList locations2 = dstGrammar.getDocumentLocations();

        for (int i=0; i<locSize; i++) {
            String loc = locations.item(i);
            if (!locations2.contains(loc)) {
                dstGrammar.addDocument(null, loc);
            }
        }
    }