You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: normalize.rb
    path of file: ./repos/truffleruby/lib/mri/unicode_normalize
    
    the code of the file until where you have to start completion: # coding: utf-8
# frozen_string_literal: false

# Copyright Ayumu Nojima (野島 歩) and Martin J. Dürst (duerst@it.aoyama.ac.jp)

# This file, the companion file tables.rb (autogenerated), and the module,
# constants, and method defined herein are part of 
    
  def self.canonical_ordering_one(string)
    sorting = string.each_char.collect { |c| [c, CLASS_TABLE[c]] }
    (sorting.length-2).downto(0) do |i| # almost, but not exactly bubble sort
      (0..i).each do |j|
        later_class = sorting[j+1].last
        if 0<later_class and later_class<sorting[j].last
          sorting[j], sorting[j+1] = sorting[j+1], sorting[j]
        end
      end
    end