public final Operation removeCurrentWriteOp() {
    Operation rv = optimizedOp;
    if (rv == null) {
      rv = writeQ.remove();
    } else {
      optimizedOp = null;
    }
    return rv;
  }
Represents a node with the memcached cluster, along with buffering and
operation queues.
src/main/java/net/spy/memcached/protocol/TCPMemcachedNodeImpl.java