code: def test_empty(self):
      self.all_removed("")
  
imports: from idlelib import pyshell
  import unittest
  from test.support import requires
  from tkinter import Tk
label_desc: Use image node_id 4 for calling the PyShellRemoveLastNewlineAndSurroundingWhitespaceTest obj's underlying member method code with example usage: obj.test_empty() without return types