# Like `write_to` but return a new Bytes (may be quite large)
	#
	# This functionality is anecdotal, since the point
	# of a streamable object is to be efficiently written to a
	# stream without having to allocate and concatenate buffers.
	#
	# Nevertheless, you might need this method if you want to know
	# the byte size of a writable object.
	fun write_to_bytes: Bytes
	do
		var stream = new BytesWriter
		write_to(stream)
		return stream.bytes
	end