def cancelUpload(self, upload):
        raise NotImplementedError('Must override cancelUpload in %s.' %
                                  self.__class__.__name__)  # pragma: no cover
Generate the special signed tr_data field required to properly
dataset/ETHPy150Open girder/girder/girder/utility/abstract_assetstore_adapter.py/AbstractAssetstoreAdapter.cancelUpload--crossover with--dataset/ETHPy150Open danielgtaylor/braintree_django/django_braintree/forms.py/BraintreeForm.generate_tr_data