if (timestamp != null)
{
operations.add(new OperationDescription<EncodingOperation>(TimestampOperation.class, null, null, timestamp.getTtl(), null));
}
NonceGenerator nonceGenerator = null;
Username username = opConfig.getUsername();
if (username != null)
{
Object user = ctx.get(Stub.USERNAME_PROPERTY);
Object pass = ctx.get(Stub.PASSWORD_PROPERTY);