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

module Barley
  class Serializer
    attr_accessor :object

    class << self
      attr_accessor :defined_attri
    
    def serializable_hash
      if @cache
        Barley::Cache.fetch(cache_base_key, expires_in: @expires_in) do
          _serializable_hash
        end
      else
        _serializable_hash
      end