code: def main(
      rng: jnp.ndarray,
      config: ml_collections.ConfigDict,
      workdir: str,
      writer: metric_writers.MetricWriter,
  ):
      """Main function for offline evaluation."""
      del workdir
      evaluate(rng=rng, config=config, writer=writer)
  
file_path: scenic/scenic/projects/unloc/evaluator.py
imports: import functools
  from typing import Any, Dict, Tuple
  from clu import metric_writers
  from flax import jax_utils
  import jax
  import jax.numpy
  import ml_collections
  from scenic import app
  from scenic.projects.unloc import eval_utils
  from scenic.projects.unloc import model
  from scenic.projects.unloc import train_utils
  from scenic.train_lib import train_utils
label_desc: Use image node_id 3 for calling a global function with example usage: main(rng, config, workdir, writer) without return types