ensure_all_registered_plugins_are_loaded!

# File railties/lib/rails/plugin/loader.rb, line 139
        def ensure_all_registered_plugins_are_loaded!
          if explicit_plugin_loading_order?
            if configuration.plugins.detect {|plugin| plugin != :all && !loaded?(plugin) }
              missing_plugins = configuration.plugins - (plugins + [:all])
              raise LoadError, "Could not locate the following plugins: #{missing_plugins.to_sentence}"
            end
          end
        end