code: def _write_close(self):
      headers = self._headers
      headers[0].pop("buffer_types")
      # hold cuda buffers
  
      _id_to_buffers[self._object_id] = headers, self._buffers
  
      self._has_write_headers = None
      self._cur_buffer_index = None
      self._cuda_buffers = None
      self._cuda_header = None
      self._offset = None
  
imports: import ctypes
  import pickle
  import uuid
  from io import BytesIO
  from typing import Tuple, Dict, List, Union
  from ..serialization import serialize, deserialize
  from ..utils import lazy_import, implements
  from .base import StorageBackend, StorageLevel, ObjectInfo, register_storage_backend
  from .core import StorageFileObject
  import numpy
  import pandas
label_desc: Use image node_id 9 for calling the CudaFileObject obj's underlying member method code with example usage: obj._write_close() without return types