code: def GetSubList(self):
      sublist = []
      for name in self.listclasses():
          item = ClassBrowserTreeItem(name, self.classes, self.file)
          sublist.append(item)
      return sublist
  
imports: import os
  import sys
  import pyclbr
  from idlelib import PyShell
  from idlelib.WindowList import ListedToplevel
  from idlelib.TreeWidget import TreeNode, TreeItem, ScrolledCanvas
  from idlelib.configHandler import idleConf
label_desc: Use image node_id 4 for calling the ModuleBrowserTreeItem obj's underlying member method code with example usage: obj.GetSubList() and returns: sublist