code: def _get_mem_actor():
      return _MemActor.options(
          name="mem_tracing_actor",
          get_if_exists=True,
          lifetime="detached",
      ).remote()
  
file_path: ray/python/ray/data/_internal/memory_tracing.py
imports: from io import StringIO
  from typing import Dict, List
  import ray
  from ray.data.context import DataContext
label_desc: Use image node_id 4 for calling a global function with example usage: _get_mem_actor() and returns: _MemActor