human
Solve the following python programming problem given the following code:
@ unittest.skipIf (no_modal_dialog_tester, 'ModalDialogTester unavailable') 
def test_help(self) : 
    def click_help_and_close(tester) : 
        tester.click_widget ('Help') 
        tester.close (accept = True) 
self.dialog.help_id = 'help_test' 
    tester = ModalDialogTester (self.dialog.open) 
    tester.open_and_wait (when_opened = <MASK>) 
    self.assertEqual (tester.result, OK) 
    self.assertEqual (self.dialog.return_code, OK) 
    
    Given the code above, what is a proper replacement for <MASK>?
assistant
#Here is a proper replacement for <MASK>.
def click_help_and_close(