code: public void send(Address dst, byte[] buf, int offset, int length) throws Exception {
          ch.send(dst, buf, offset, length);
      }
docs: Sends a message to a destination.
  
  @param dst
  The destination address. If null, the message will be sent to all cluster nodes (=
  group members)
  @param buf
  The buffer to be sent
  @param offset
  The offset into the buffer
  @param length
  The length of the data to be sent. Has to be <= buf.length - offset. This will send
  <code>length</code> bytes starting at <code>offset</code>
  @throws Exception
  If send() failed