code: public BytesBuilder addChunk(@NonNull byte[] buffer, int offset, int length)
  	{
  		Objects.requireNonNull(buffer);
  
  		out.write(buffer, offset, length);
  		return this;
  	}
docs: Add a chunk of data to the {@link Bytes} instance.
  
  @param buffer
  byte data to add
  @param offset
  offset to start adding byte data from
  @param length
  the length of the data to add