def authenticate_header(self, request):
        return 'Bearer realm="%s"' % self.www_authenticate_realm
starting dirs & files:
dataset/ETHPy150Open jlafon/django-rest-framework-oauth/rest_framework_oauth/authentication.py/OAuth2Authentication.authenticate_header--crossover with--dataset/ETHPy150Open kenfar/DataGristle/scripts/tests/test_gristle_dir_merger_cmd.py/TestEmpties.test_nonempty_subdir_to_empty