code: def __init__(self):
      self.constructors = {}
  
file_path: mlflow/mlflow/data/dataset_registry.py
imports: import inspect
  import warnings
  from contextlib import suppress
  from typing import Dict, Optional
  import entrypoints
  import mlflow.data
  from mlflow.data.dataset import Dataset
  from mlflow.exceptions import MlflowException
  from mlflow.protos.databricks_pb2 import INVALID_PARAMETER_VALUE
label_desc: Use image node_id 1 to create a new DatasetRegistry object  with example: obj = DatasetRegistry()