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: schwartzian_transform.rb
    path of file: ./repos/jekyll/benchmark
    
    the code of the file until where you have to start completion: #!/usr/bin/env ruby
# frozen_string_literal: true
#
# The Ruby documentation for #sort_by describes what's called a 
    
  def initialize(docs, property)
    @assertions = 0
    @docs = docs
    @property = property
  end

  def assert!
    assert sort_by_property_directly(@docs, @property).is_a?(Array), "sort_by_property_directly must return an array"
    assert schwartzian_transform(@docs, @property).is_a?(Array), "schwartzian_transform must return an array"
    assert_equal sort_by_property_directly(@docs, @property),
      schwartzian_transform(@docs, @property)
    puts "Yeah, ok, correctness all checks out for property #{@property.inspect}"
  end
end