@abstractmethod
    def validate_metadata(metadata):
        pass
Open and yield file for reading the image file for an image
dataset/ETHPy150Open jessemyers/cheddar/cheddar/index/index.py/Index.validate_metadata--crossover with--dataset/ETHPy150Open rcbops/glance-buildpackage/glance/image_cache/drivers/sqlite.py/Driver.open_for_read