code: def get_trainer(trainer_name):
      """Returns the trainer to use."""
      if trainer_name == "avmae_trainer":
          return avmae_trainer.train
      elif trainer_name == "avmae_transfer_trainer":
          return avmae_transfer_trainer.train
      elif trainer_name == "avmae_multimodal_trainer":
          return avmae_multimodal_trainer.train
      elif trainer_name == "transfer_trainer_multimodal":
          return transfer_trainer_multimodal.train
      else:
          raise ValueError(f"Unsupported trainer: {trainer_name}")
  
file_path: scenic/scenic/projects/av_mae/main.py
imports: from absl import flags
  from clu import metric_writers
  from clu import platform
  import flax
  from flax.training import checkpoints
  import jax
  import jax.numpy
  import ml_collections
  from scenic import app
  from scenic.projects.av_mae import registry
  from scenic.projects.av_mae import trainer
  from scenic.projects.av_mae import trainer_multimodal
  from scenic.projects.av_mae import transfer_trainer
  from scenic.projects.av_mae import transfer_trainer_multimodal
  from scenic.train_lib_deprecated import train_utils
label_desc: Use image node_id 1 for calling a global function with example usage: get_trainer(trainer_name) and returns: avmae_trainer, avmae_transfer_trainer, avmae_multimodal_trainer, transfer_trainer_multimodal