def _is_installation_cd(self, image):
        if isinstance(image, CloudSigmaDrive) and image.media == 'cdrom':
            return True

        return False
Trivial links should be merged, discarding the duplicate ID
dataset/ETHPy150Open apache/libcloud/libcloud/compute/drivers/cloudsigma.py/CloudSigma_2_0_NodeDriver._is_installation_cd--crossover with--dataset/ETHPy150Open glue-viz/glue/glue/core/tests/test_data_collection.py/TestDataCollection.test_merge_links