# Set the local name of a specific attribute.
	#
	# Parameters:
	#
	# * `index`: index of the attribute (zero-based).
	# * `local_name`: attribute's local name, or the empty string for none.
	fun local_name=(index: Int, local_name: String) do
		assert index_in_bounds: index >= 0 and index < length
		data[index * 5 + 1] = local_name
	end