class_docstr: A base class for sidebars using Text.
docstr: Update the sidebar text font, usually after config changes.
docstr_tok: ["Update","the","sidebar","text","font",",","usually","after","config","changes","."]
code: def update_font(self):
      """Update the sidebar text font, usually after config changes."""
      raise NotImplementedError
  
imports: import contextlib
  import functools
  import itertools
  import tkinter
  from tkinter.font import Font
  from idlelib.config import idleConf
  from idlelib.delegator import Delegator
  from idlelib import macosx
label_desc: Use image node_id 3 for calling the BaseSideBar obj's underlying member method code with example usage: obj.update_font() without return types