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: helpers.rb
    path of file: ./repos/resque/lib/resque
    
    the code of the file until where you have to start completion: require 'multi_json'

# OkJson won't work because it doesn't serialize symbols
# in the same way yajl and json do.
if MultiJson.respond_to?(:adapter)
  raise "Please install the yajl-ruby or json gem" if Mul
    
    def redis
      # No infinite recursions, please.
      # Some external libraries depend on Resque::Helpers being mixed into
      # Resque, but this method causes recursions. If we have a super method,
      # assume it is canonical. (see #1150)
      return super if defined?(super)

      Resque.redis
    end