code: def downgrade_job_v2_to_v1():
      return [drop(["container_name"])]
  
file_path: PySyft/packages/syft/src/syft/service/worker/worker.py
imports: from ...serde.serializable import serializable
  from ...store.document_store import SYFT_OBJECT_VERSION_1
  from ...store.document_store import SyftObject
  from ...types.datetime import DateTime
  from ...types.syft_migration import migrate
  from ...types.syft_object import SYFT_OBJECT_VERSION_2
  from ...types.transforms import drop
  from ...types.transforms import make_set_default
label_desc: Use image node_id 1 for calling a global function with example usage: downgrade_job_v2_to_v1() and returns: list