# File lib/new_relic/control/frameworks/rails.rb, line 127
        def install_shim
          super
          require 'new_relic/agent/instrumentation/controller_instrumentation'
          if ActiveSupport.respond_to?(:on_load) # rails 3+
            ActiveSupport.on_load(:action_controller) { include NewRelic::Agent::Instrumentation::ControllerInstrumentation::Shim }
          else
            ActionController::Base.class_eval { include NewRelic::Agent::Instrumentation::ControllerInstrumentation::Shim }
          end
        end