_all_load_paths

# File railties/lib/rails/engine.rb, line 729
      def _all_load_paths(add_autoload_paths_to_load_path)
        @_all_load_paths ||= begin
          load_paths = config.paths.load_paths
          if add_autoload_paths_to_load_path
            load_paths += _all_autoload_paths
            load_paths += _all_autoload_once_paths
          end
          load_paths.uniq
        end
      end