class_docstr: Code stack viewer for debugger GUI.
docstr: Override base method.
docstr_tok: ["Override","base","method","."]
code: def popup_event(self, event):
      "Override base method."
      if self.stack:
          return ScrolledList.popup_event(self, event)
  
imports: import bdb
  import os
  from tkinter import *
  from tkinter.ttk import Frame, Scrollbar
  from idlelib import macosx
  from idlelib.scrolledlist import ScrolledList
  from idlelib.window import ListedToplevel
label_desc: Use image node_id 3 for calling the StackViewer obj's underlying member method code with example usage: obj.popup_event(event) and returns: ScrolledList