code: def _coll_repr_(self):
      return {
          "container_name": self.container_name,
          "container_id": self.container_id,
          "created_at": self.created_at,
      }
  
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 the DockerWorker obj's underlying member method code with example usage: obj._coll_repr_() and returns: dict