<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def cursor_after(self):
 """Return the cursor after the current item. You must pass a QueryOptions object with produce_cursors=True for this to work. If there is no cursor or no current item, raise BadArgumentError. Before next() has returned there is no cursor. Once the loop is exhausted, this returns the cursor after the last item. """

    if isinstance(self._cursor_after, BaseException):
      raise self._cursor_after
    return self._cursor_after