@Override
  public void initialize() {
    int size = KeyUtil.getKeyBytes(key).length + OVERHEAD;
    ByteBuffer b = ByteBuffer.allocate(size);
    setArguments(b, mutator.name(), key, amount);
    b.flip();
    setBuffer(b);
  }
Operation for mutating integers inside of memcached.
src/main/java/net/spy/memcached/protocol/ascii/MutatorOperationImpl.java