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: enc-emoji4unicode.rb
    path of file: ./repos/ruby/tool
    
    the code of the file until where you have to start completion: #!/usr/bin/env ruby

# example:
# ./enc-emoji4unicode.rb emoji4unicode.xml > ../enc/trans/emoji-exchange-tbl.rb

require 'rexml/document'
require File.expand_path("../transcode-tblgen", __FILE__)

class EmojiTable
  VERBOSE_MODE = false

  def init
    
  def make_kddi_undoc_map()
    pub_to_sjis = citrus_decode_mapsrc(
      "mskanji", 2, "UCS/EMOJI_SHIFT_JIS-KDDI").sort_by{|u, s| s}
    sjis_to_undoc = citrus_decode_mapsrc(
      "mskanji", 2, "EMOJI_SHIFT_JIS-KDDI-UNDOC/UCS").sort_by{|s, u| s}
    return pub_to_sjis.zip(sjis_to_undoc).inject({}) {|h, rec|
      raise "no match sjis codepoint" if rec[0][1] != rec[1][0]
      h[rec[0][0]] = rec[1][1]
      next h
    }
  end