code: def _read_init(self):
      self._buffer = buf = self._plasma_client.get_buffers(
          [self._object_id]
      )[0]
      self._mv = memoryview(buf)
      self._size = len(buf)
  
imports: import asyncio
  import sys
  from dataclasses import dataclass
  from functools import lru_cache
  from typing import Any, Dict, List, Optional, Tuple
  import psutil
  import pyarrow
  from ..resource import virtual_memory
  from ..serialization import AioSerializer, AioDeserializer
  from ..utils import implements, dataslots, calc_size_by_str, lazy_import
  from .base import StorageBackend, StorageLevel, ObjectInfo, register_storage_backend
  from .core import BufferWrappedFileObject, StorageFileObject
  from .errors import DataNotExist
label_desc: Use image node_id 4 for calling the PlasmaFileObject obj's underlying member method code with example usage: obj._read_init() without return types