code: def get_process_id(cls) -> int:
      return int(os.environ[_PROCESS_ID])
  
file_path: jax/jax/_src/clusters/ompi_cluster.py
imports: from __future__ import annotations
  import os
  import re
  from jax._src import clusters
label_desc: Use image node_id 4 for calling the OmpiCluster obj's underlying member method code with example usage: obj.get_process_id(cls) and returns: int