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: installed_specification.rb
    path of file: ./repos/artichoke/artichoke-backend/vendor/ruby/lib/rubygems/resolver
    
    the code of the file until where you have to start completion: # frozen_string_literal: tru
    
  def installable_platform?
    # BACKCOMPAT If the file is coming out of a specified file, then we
    # ignore the platform. This code can be removed in RG 3.0.
    return true if @source.kind_of? Gem::Source::SpecificFile

    super
  end