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: dictionary.rb
    path of file: ./repos/anystyle/lib/anystyle
    
    the code of the file until where you have to start completion: module AnyStyle
  class Dictionary
    @tags = [:name, :place, :publisher, :journal]

    @code = Hash[
      *@tags.zip(0.upto(@tags.length-1).map { |i| 2**i }).flatten
    ]

    @tags.freeze
    @code.freeze

    @defaults = {
      adapter: :ruby,
      so
    
    def tag_counts(keys)
      counts = Dictionary.tags.map { 0 }
      keys.each do |key|
        value = get(key)
        Dictionary.tags.each.with_index do |tag, idx|
          counts[idx] += 1 if (value & Dictionary.code[tag] > 0)
        end if value > 0
      end
      counts
    end

    def populate!
      require 'zlib'

      File.open(options[:source], 'rb') do |file|
        mode = 0

        Zlib::GzipReader.new(file, encoding: 'UTF-8').each do |line|
          line.strip!

          case line
          when /^#! (\w+)/i
            mode = Dictionary.code[$1.to_sym]
          when /^#/
            # skip comments
          else
            key = line.split(/\s+(\d+\.\d+)\s*$/)[0]
            put key, get(key) | mode
          end
        end
      end
    end