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: ruby2_keywords_spec.rb
    path of file: ./repos/natalie/spec/core/module
    
    the code of the file until where you have to start completion: require_relative '../../spec_helper'
require_relative 'fixtures/classes'

describe "Module#ruby2_keywords" do
  class << self
    ruby2_keywords def mark(*args)
      args
    end
  end

  it "marks the final hash argument as keyword hash" do
    last = mark(1, 2,
    
      def foo(*a) a.last end
      alias_method :bar, :foo
      ruby2_keywords :foo

      def baz(*a) a.last end
      ruby2_keywords :baz
      alias_method :bob, :baz
    end

    last = obj.foo(1, 2, a: "a")
    Hash.ruby2_keywords_hash?(last).should == true

    last = obj.bar(1, 2, a: "a")
    NATFIXME 'applies to the underlying method and applies across aliasing', exception: SpecFailedException do
      Hash.ruby2_keywords_hash?(last).should == true
    end

    last = obj.baz(1, 2, a: "a")
    Hash.ruby2_keywords_hash?(last).should == true

    last = obj.bob(1, 2, a: "a")
    Hash.ruby2_keywords_hash?(last).should == true
  end