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: conservative_router.rb
    path of file: ./repos/i18n-tasks/lib/i18n/tasks/data/router
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require 'i18n/tasks/data/router/pattern_router'

module I18n::Tasks
  module Data::Router
    # Keep the path, or infer from base locale
    class ConservativeRouter < PatternRouter
      def initialize(adapter, config)
       
    
      def route(locale, forest, &block) # rubocop:disable Metrics/AbcSize
        return to_enum(:route, locale, forest) unless block

        out = Hash.new { |hash, key| hash[key] = Set.new }
        not_found = Set.new
        forest.keys do |key, _node|
          path = key_path(locale, key)
          # infer from another locale
          unless path
            inferred_from = (locales - [locale]).detect { |loc| path = key_path(loc, key) }
            path = LocalePathname.replace_locale(path, inferred_from, locale) if inferred_from
          end
          key_with_locale = "#{locale}.#{key}"
          if path
            out[path] << key_with_locale
          else
            not_found << key_with_locale
          end