def load!
      unless loaded?
        ActiveSupport::Notifications.publish BeforeLoadEvent, self # before_load hook
        files.each { |file| load file }                            # load files
        namespace(default_namespace)                               # init AA resources
        ActiveSupport::Notifications.publish AfterLoadEvent, self  # after_load hook
        @@loaded = true
      end
    end
def load!
      unless loaded?
        ActiveSupport::Notifications.publish BeforeLoadEvent, self # before_load hook
        files.each { |file| load file }                            # load files
        namespace(default_namespace)                               # init AA resources
        ActiveSupport::Notifications.publish AfterLoadEvent, self  # after_load hook
        @@loaded = true
      end
    end
Loads all ruby files that are within the load_paths setting.
 To reload everything simply call `ActiveAdmin.unload!`