_all_autoload_paths

# File railties/lib/rails/engine.rb, line 718
      def _all_autoload_paths
        @_all_autoload_paths ||= begin
          autoload_paths  = config.all_autoload_paths
          autoload_paths += config.all_eager_load_paths
          autoload_paths -= config.all_autoload_once_paths
          autoload_paths.uniq
        end
      end