class_docstr: Base class inherited by all model classes.
  
  A model class implements interfaces that are compatible with
  :tf_main:`TF Estimator <estimator/Estimator>`. In particular,
  :meth:`_build` implements the
  :tf_main:`model_fn <estimator/Estimator#__init__>` interface; and
  :meth:`get_input_fn` is for the :attr:`input_fn` interface.
  
  .. document private functions
  .. automethod:: _build
docstr: Returns a dictionary of hyperparameters with default values.
          
code: def default_hparams():
      """Returns a dictionary of hyperparameters with default values."""
      hparams = {"name": "model"}
      return hparams
  
file_path: texar/texar/tf/models/model_base.py
imports: from texar.tf.hyperparams import HParams
label_desc: Use image node_id 2 for calling the ModelBase obj's underlying member method code with example usage: obj.default_hparams() and returns: hparams