class_docstr: The debugger interface.
  
  This class handles the drawing of the debugger window and
  the interactions with the underlying debugger session.
code: def sync_source_line(self):
      frame = self.frame
      if not frame:
          return
      filename, lineno = self.__frame2fileline(frame)
      if filename[:1] + filename[-1:] != "<>" and os.path.exists(
          filename
      ):
          self.flist.gotofileline(filename, lineno)
  
imports: import bdb
  import os
  from tkinter import *
  from tkinter.ttk import Frame, Scrollbar
  from idlelib import macosx
  from idlelib.scrolledlist import ScrolledList
  from idlelib.window import ListedToplevel
label_desc: Use image node_id 6 for calling the Debugger obj's underlying member method code with example usage: obj.sync_source_line() without return types