class_docstr: Client of an MLflow Model Registry Server that creates and manages registered
  models and model versions.
docstr: Updates description for RegisteredModel entity.
  
  Backend raises exception if a registered model with given name does not exist.
  
  :param name: Name of the registered model to update.
  :param description: New description.
  :return: A single updated :py:class:`mlflow.entities.model_registry.RegisteredModel` object.
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code: def update_registered_model(self, name, description):
      """
      Updates description for RegisteredModel entity.
  
      Backend raises exception if a registered model with given name does not exist.
  
      :param name: Name of the registered model to update.
      :param description: New description.
      :return: A single updated :py:class:`mlflow.entities.model_registry.RegisteredModel` object.
      """
      return self.store.update_registered_model(
          name=name, description=description
      )
  
imports: import logging
  from mlflow.entities.model_registry import ModelVersionTag, RegisteredModelTag
  from mlflow.exceptions import MlflowException
  from mlflow.store.model_registry import SEARCH_MODEL_VERSION_MAX_RESULTS_DEFAULT, SEARCH_REGISTERED_MODEL_MAX_RESULTS_DEFAULT
  from mlflow.tracking._model_registry import DEFAULT_AWAIT_MAX_SLEEP_SECONDS, utils
  from mlflow.utils.arguments_utils import _get_arg_names
label_desc: Use image node_id 4 for calling the ModelRegistryClient obj's underlying member method code with example usage: obj.update_registered_model(name, description) and returns: self