code: def test_getsublist(self):
      mbt = self.mbt
      mbt.listchildren = Func(result=[f0, C0])
      sub0, sub1 = mbt.GetSubList()
      del mbt.listchildren
      self.assertIsInstance(sub0, browser.ChildBrowserTreeItem)
      self.assertIsInstance(sub1, browser.ChildBrowserTreeItem)
      self.assertEqual(sub0.name, "f0")
      self.assertEqual(sub1.name, "C0(base)")
  
imports: from idlelib import browser
  from test.support import requires
  import unittest
  from unittest import mock
  from idlelib.idle_test.mock_idle import Func
  from idlelib.util import py_extensions
  from collections import deque
  import os.path
  import pyclbr
  from tkinter import Tk
  from idlelib.tree import TreeNode
label_desc: Use image node_id 7 for calling the ModuleBrowserTreeItemTest obj's underlying member method code with example usage: obj.test_getsublist() without return types