docs: public int sendTCP (Object object) {
  		if (object == null) throw new IllegalArgumentException("object cannot be null.");
  		try {
  			int length = tcp.send(this, object);
  			if (length == 0) {
  				if (TRACE) trace("kryonet", this + " TCP had nothing to send.");
  			} else if (DEBUG) {
  				String objectString = object == null ? "null" : object.getClass().getSimpleName();
  				if (!(object instanceof FrameworkMessage)) {
  					debug("kryonet", this + " sent TCP: " + objectString + " (" + length + ")");
  				} else if (TRACE) {
  					trace("kryonet", this + " sent TCP: " + objectString + " (" + length + ")");
  				}
  			}
  			return length;
  		} catch (IOException ex) {
  			if (DEBUG) debug("kryonet", "Unable to send TCP with connection: " + this, ex);
  			close();
  			return 0;
  		} catch (KryoNetException ex) {
  			if (ERROR) error("kryonet", "Unable to send TCP with connection: " + this, ex);
  			close();
  			return 0;
  		}
  	}