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: backend.rb
    path of file: ./repos/nii/nii-i18n/lib/nii/i18n
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require 'i18n'

module Nii::I18n
  class B
    
    def initialize(config = {})
      @config = Nii::Config.new(config)

      unless @config.i18n_backend
        i18n_backend = ::I18n.config.backend # try to capture this right before asignment
        i18n_backend = i18n_backend.config.i18n_backend while i18n_backend&.config&.i18n_backend
        @config      = @config.merge(i18n_backend: i18n_backend)
      end