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: evaluate.rb
    path of file: ./repos/truffleruby/spec/mspec/lib/mspec/runner
    
    the code of the file until where you have to start completion: class SpecEvaluate
  include MSpecMatchers

  def self.desc=(desc)
    @desc = desc
  end

  def self.desc
    @desc 
    
  def define(&block)
    ruby = @ruby
    desc = @desc
    evaluator = self

    specify "#{desc} #{format ruby}" do
      evaluator.instance_eval(ruby)
      evaluator.instance_eval(&block)
    end
  end