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: config.rb
    path of file: ./repos/email_address/lib/email_address
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module EmailAddress
  # Global configurations and for default/unknown providers. Settings are:
  #
  # * dns_lookup:         :mx, :a, :off
  #   Enables DNS l
    
    def self.error_messages(hash = {}, locale = "en", *extra)
      hash = extra.first if extra.first.is_a? Hash

      @errors[locale] ||= {}
      @errors[locale]["email_address"] ||= {}

      unless hash.nil? || hash.empty?
        @errors[locale]["email_address"] = @errors[locale]["email_address"].merge(hash)
      end