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

module Rainbow
  class StringUtils
    def self.wrap_with_sgr(string, codes)
      return s
    
    def self.wrap_with_sgr(string, codes)
      return string if codes.empty?

      seq = "\e[" + codes.join(";") + "m"

      # Skip extending if there are no existing control sequences.
      if string.include?("\e")
        string = string.sub(/^(\e\[([\d;]+)m)+/) { |m| m + seq }
        string += "\e[0m" unless string.end_with? "\e[0m"
        string
      else
        seq + string + "\e[0m"
      end