@abstractmethod
    def get_content_sha1(self):
Create a download view decorator.
dataset/ETHPy150Open Backblaze/B2_Command_Line_Tool/b2/upload_source.py/AbstractUploadSource.get_content_sha1--crossover with--dataset/ETHPy150Open benoitbryon/django-downloadview/django_downloadview/decorators.py/DownloadDecorator.__init__