code: def __navigation_menu(self):
      navigation_menu = cellprofiler.gui.menu.Menu(self.frame)
  
      navigation_menu.append(
          "Using the File Menu",
          contents=cellprofiler.gui.help.content.read_content(
              "navigation_file_menu.rst"
          ),
      )
  
      navigation_menu.append(
          "Using the Edit Menu",
          contents=cellprofiler.gui.help.content.read_content(
              "navigation_edit_menu.rst"
          ),
      )
  
      navigation_menu.append(
          "Using the Test Menu",
          contents=cellprofiler.gui.help.content.read_content(
              "navigation_test_menu.rst"
          ),
      )
  
      navigation_menu.append(
          "Using the Window Menu",
          contents=cellprofiler.gui.help.content.read_content(
              "navigation_window_menu.rst"
          ),
      )
  
      return navigation_menu
  
imports: import webbrowser
  import wx.adv
  from cellprofiler.gui.dialog import AboutDialogInfo
  import cellprofiler.gui.help.content
  import cellprofiler.gui.help.search
  import cellprofiler.gui.htmldialog
  import cellprofiler.gui.menu
label_desc: Use image node_id 6 for calling the Menu obj's underlying member method code with example usage: obj.__navigation_menu() and returns: navigation_menu