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: util.rb
    path of file: ./repos/mechanize/lib/mechanize
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require 'cgi'
require 'nkf'

class Mechanize::Util
  # default mime type data for Page::Image#mime_type.
  # You can use another Apache-compatible mimetab.
  #   mimetab = WEBrick::HTTPUtils.load_mime_types('/etc/mime.types')
  #   Mechanize::Util::DefaultMimeTypes.replace(mimetab)
  DefaultMimeTypes = WEBri
    
  def self.from_native_charset(s, code, ignore_encoding_error = false, log = nil)
    return s unless s && code
    return s unless Mechanize.html_parser == Nokogiri::HTML

    begin
      s.encode(code)
    rescue EncodingError => ex
      log.debug("from_native_charset: #{ex.class}: form encoding: #{code.inspect} string: #{s}") if log
      if ignore_encoding_error
        s
      else
        raise
      end