def METHOD_NAME(self):
    # clear_submission_lock removes the existing lock
    assert SubmissionGradingLock.get_submission_lock(self.locked_submission_uuid) == self.existing_submission_lock
    SubmissionGradingLock.clear_submission_lock(self.locked_submission_uuid, self.user_id)
    assert SubmissionGradingLock.get_submission_lock(self.locked_submission_uuid) is None