code: def checkpoint_path(window):
      return f"gs://my_bucket/checkpoints/random-forest/{window}"
  
file_path: hail/hail/python/hailtop/batch/docs/cookbook/files/run_rf_checkpoint.py
imports: import hailtop.batch
  import hailtop.fs
  import pandas
  from typing import Tuple
  from sklearn.ensemble import RandomForestRegressor
label_desc: Use image node_id 3 for calling a global function with example usage: checkpoint_path(window) and returns: str, window