class_docstr: This class contains all the functions needed for supporting
  an accelerator family in Ray.
docstr: Get the env var that sets the ids of visible accelerators of this family.
  
  Returns:
      The env var for setting visible accelerator ids: e.g.,
          CUDA_VISIBLE_DEVICES for Nvidia GPUs.
docstr_tok: ["Get","the","env","var","that","sets","the","ids","of","visible","accelerators","of","this","family",".","Returns",":","The","env","var","for","setting","visible","accelerator","ids",":","e.g.",",","CUDA_VISIBLE_DEVICES","for","Nvidia","GPUs","."]
code: def get_visible_accelerator_ids_env_var() -> str:
      """Get the env var that sets the ids of visible accelerators of this family.
  
      Returns:
          The env var for setting visible accelerator ids: e.g.,
              CUDA_VISIBLE_DEVICES for Nvidia GPUs.
      """
  
file_path: ray/python/ray/_private/accelerators/accelerator.py
imports: from abc import ABC, abstractmethod
  from typing import Dict, Optional, List, Tuple
label_desc: Use image node_id 2 for calling the AcceleratorManager obj's underlying member method code with example usage: obj.get_visible_accelerator_ids_env_var() without return types