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: install_generator.rb
    path of file: ./repos/bootstrap-generators/lib/generators/bootstrap/install
    
    the code of the file until where you have to start completion: require 'rails/generators'

module Bootstrap
  module Generators
    class InstallGenerator < ::Rails::Generators::Base
      desc 'Copy BootstrapGenerators default files'
      source_root ::File.expand_path('../templates', __FILE__)

    
    
      def create_stylesheets
        stylesheet_extension = options[:stylesheet_engine] || 'css'

        copy_file "assets/stylesheets/starter.#{stylesheet_extension}", "app/assets/stylesheets/bootstrap-generators.#{stylesheet_extension}"

        if [:less, :scss].include?(options[:stylesheet_engine].to_sym)
          copy_file "assets/stylesheets/bootstrap-variables.#{stylesheet_extension}", "app/assets/stylesheets/bootstrap-variables.#{stylesheet_extension}"
        end