public List<Vertex> getVertecies(final Class<? extends ModuleBase> module) {
        ArrayList<Vertex> ret = new ArrayList<Vertex>();
        Iterator<Vertex> iter = iteratorOfVertex();

        while (iter.hasNext()) {
            Vertex vertex = iter.next();
            if (vertex.getModuleClass().equals(module)) {
                ret.add(vertex);
            }
        }
        return ret;
    }