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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def handle(self, *test_labels, **options):
 """ Set the default Gherkin test runner. """

        if not options.get('testrunner', None):
            options['testrunner'] = test_runner_class

        return super(Command, self).handle(*test_labels, **options)