code: def is_zoo_model_downloaded(name):
      """Determines whether the zoo model of the given name is downloaded.
  
      Args:
          name: the name of the zoo model, which can have ``@<ver>`` appended to
              refer to a specific version of the model. If no version is
              specified, the latest version of the model is used
  
      Returns:
          True/False
      """
      model = _get_model(name)
      models_dir = fo.config.model_zoo_dir
      return model.is_in_dir(models_dir)
  
imports: from collections import defaultdict
  from copy import deepcopy
  import logging
  import os
  import weakref
  from eta.core.config import ConfigError
  import eta.core.learning
  import eta.core.models
  import eta.core.utils
  import fiftyone
  import fiftyone.core.models
label_desc: Use image node_id 3 for calling a global function with example usage: is_zoo_model_downloaded(name) and returns: model