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_loader_spec.rb
    path of file: ./repos/rubocop/spec/rubocop
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

RSpec.describe RuboCop::ConfigLoader do
  include Fil
    
                def self.inject!
                  path = 'third_party/default.yml'

                  # Injection code currently used in extensions
                  hash = ConfigLoader.send(:load_yaml_configuration, path)
                  config = Config.new(hash, path)
                  config = ConfigLoader.merge_with_default(config, path)
                  ConfigLoader.instance_variable_set(:@default_configuration, config)
                end