code: def get_model_cls(model_name: str) -> Any:
      """Returns model class given its name."""
      if model_name == "bert":
          return bert_model.BERTModel
      if model_name == "bert_classification":
          return bert_model.BERTClassificationModel
      if model_name == "bert_regression":
          return bert_model.BERTRegressionModel
      else:
          raise ValueError(f"Unrecognized model: {model_name}.")
  
file_path: scenic/scenic/projects/baselines/bert/main.py
imports: import importlib
  from typing import Any
  from absl import flags
  from clu import metric_writers
  import jax
  import jax.numpy
  import ml_collections
  from scenic import app
  from scenic.projects.baselines.bert import model
  from scenic.projects.baselines.bert import trainer
  from scenic.train_lib import train_utils
label_desc: Use image node_id 1 for calling a global function with example usage: get_model_cls(model_name) and returns: bert_model, bert_model, bert_model