code: public synchronized PacketBuilder withByte(final byte b)
      {
          checkBuilt();
          try
          {
              dataOutputStream.writeByte(b);
          }
          catch (final IOException e)
          {
              logger.error("Unable to add byte: {} : {}", e.getClass(), e.getMessage());
          }
          return this;
      }
docs: Adds a byte
  @param b Byte
  @throws IllegalStateException see {@link #checkBuilt()}