code: @Override
    public boolean isAllowed(int code, long vendorId) {
      AvpRepresentation avpRep = new AvpRepresentationImpl(code, vendorId);
      avpRep = this.unmuttableMessageAvps.get(avpRep);
      if (avpRep == null) {
        return true;
      }
      return avpRep.isAllowed();
    }
docs: Convenience methods ------------------------------------------------------