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: engine.rb
    path of file: ./repos/teaspoon/lib/teaspoon
    
    the code of the file until where you have to start completion: require "teaspoon/environment"
require "teaspoon/suite"
require "teaspoon/instrumentation"

module Teaspoon
  class Engine < ::Rails::Engine
    isola
    
      def self.add_rails_handling
        return unless using_phantomjs?

        # debugging should be off to display errors in the suite_controller
        # Rails.application.config.assets.debug = false

        # we want rails to display exceptions
        Rails.application.config.action_dispatch.show_exceptions = true

        # override the render exception method in ActionDispatch to raise a javascript exception
        render_exceptions_with_javascript
      end