code: protected WsByteBuffer[] putInt(int data, WsByteBuffer[] buffers) {
          return putBytes(GenericUtils.asBytes(data), buffers);
      }
docs: Place the input int value into the outgoing cache. This will return
  the buffer array as it may have changed if the cache need to be flushed.
  
  @param data
  @param buffers
  @return WsByteBuffer[]