code: def _register_default_handlers() -> None:
      handler_registry.register("etcd", _create_etcd_handler)
      handler_registry.register("etcd-v2", _create_etcd_v2_handler)
      handler_registry.register("c10d", _create_c10d_handler)
      handler_registry.register("static", _create_static_handler)
  
file_path: pytorch/torch/distributed/elastic/rendezvous/registry.py
imports: from .api import RendezvousHandler, RendezvousParameters
  from .api import rendezvous_handler_registry
  from .dynamic_rendezvous import create_handler
label_desc: Use image node_id 5 for calling a global function with example usage: _register_default_handlers() without return types