code: def destroy_model_parallel() -> None:
      """Set the groups to none."""
      global _MODEL_PARALLEL_GROUP
      _MODEL_PARALLEL_GROUP = None
      global _DATA_PARALLEL_GROUP
      _DATA_PARALLEL_GROUP = None
      global _PIPELINE_PARALLEL_GROUP
      _PIPELINE_PARALLEL_GROUP = None
  
      global _PIPELINE_PARALLEL_RANKS
      _PIPELINE_PARALLEL_RANKS = None
  
file_path: fairscale/fairscale/nn/model_parallel/initialize.py
imports: from typing import List, Optional
  import torch
  from .utils import ensure_divisibility
label_desc: Use image node_id 12 for calling a global function with example usage: destroy_model_parallel() without return types