# Creates a new `Bytes` object from a copy of `self` with `len` as length
	#
	# If `len` is null, strlen will determine the length of the Bytes
	fun to_bytes_with_copy(len: nullable Int): Bytes do
		if len == null then len = cstring_length
		var nns = new CString(len)
		copy_to(nns, len, 0, 0)
		return new Bytes(nns, len, len)
	end