class_docstr: ProcessGroupManager is used to manage the process groups in the cluster.
  
  There are some terms used in this class:
      - pg: the short name for process group
      - pg_name: the name of the process group
      - pg_size: the world size of the process group
      - rank: the rank of the current process in the process group
      - world_size: the total number of processes in the process group
docstr: Destroy a process group by name.
  
  Args:
      name (str): name of the process group
docstr_tok: ["Destroy","a","process","group","by","name",".","Args",":","name","(","str",")",":","name","of","the","process","group"]
code: def destroy(self, name: str) -> None:
      """
      Destroy a process group by name.
  
      Args:
          name (str): name of the process group
      """
      if name in self.pg_store:
          dist.destroy_process_group(self.pg_store[name])
          del self.pg_store[name]
      else:
          raise ValueError(f"Process group {name} does not exist.")
  
file_path: colossalai/colossalai/cluster/process_group_manager.py
imports: from typing import List
  import torch.distributed
  from torch.distributed import ProcessGroup
label_desc: Use image node_id 4 for calling the ProcessGroupManager obj's underlying member method code with example usage: obj.destroy(name) without return types