code: def deselectall(self):
      if self.parent:
          self.parent.deselectall()
      else:
          self.deselecttree()
  
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 6 for calling the TreeNode obj's underlying member method code with example usage: obj.deselectall() without return types