def has_marker(self, marker):
        return exists(join(self.build_dir, ".{}".format(marker)))
GET /queued_images
dataset/ETHPy150Open kivy/kivy-ios/toolchain.py/Recipe.has_marker--crossover with--dataset/ETHPy150Open rcbops/glance-buildpackage/glance/api/cached_images.py/Controller.get_queued_images