code: def collapse(self, event=None):
      if self.state != "collapsed":
          self.state = "collapsed"
          self.update()
  
imports: import os
  from tkinter import *
  from tkinter.ttk import Frame, Scrollbar
  from idlelib.config import idleConf
  from idlelib import zoomheight
label_desc: Use image node_id 10 for calling the TreeNode obj's underlying member method code with example usage: obj.collapse(event) without return types