+ {"items": [{"created_at": "",
+ "head_uuid": "",
+ "link_class": "docker_image_hash",
+ "name": "123456",
+ "owner_uuid": "",
+ "properties": {"image_timestamp": ""}}], "items_available": 1, "offset": 0},
+ {"items": [{"created_at": "",
+ "head_uuid": "zzzzz-4zz18-zzzzzzzzzzzzzzb",
+ "link_class": "docker_image_repo+tag",
+ "name": "arvados/jobs:"+arvados_cwl.__version__,
+ "owner_uuid": "",
+ "properties": {"image_timestamp": ""}}], "items_available": 1, "offset": 0},