default_helper_module!

# File actionpack/lib/action_controller/helpers.rb, line 190
        def default_helper_module!
          unless name.blank?
            module_name = name.sub(/Controller$|$/, 'Helper')
            module_path = module_name.split('::').map { |m| m.underscore }.join('/')
            require_dependency module_path
            helper module_name.constantize
          end
        rescue MissingSourceFile => e
          raise unless e.is_missing? module_path
        rescue NameError => e
          raise unless e.missing_name? module_name
        end