code: def __init__(self):
      self.allocated: Dict[ray.ObjectRef, dict] = {}
      self.deallocated: Dict[ray.ObjectRef, dict] = {}
      self.skip_dealloc: Dict[ray.ObjectRef, str] = {}
      self.peak_mem = 0
      self.cur_mem = 0
  
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 1 to create a new _MemActor object  with example: obj = _MemActor()