class_docstr: Package data with crc32 or not.
      
class_docstr_tok: ["Package","data","with","crc32","or","not","."]
code: def close(self):
      self._writer.close()
  
imports: from visualdl.io import bfile
  from visualdl.utils.crc32 import masked_crc32c
  from visualdl.proto import record_pb2
  import struct
  import time
  import queue
  import threading
  import os
label_desc: Use image node_id 5 for calling the RecordWriter obj's underlying member method code with example usage: obj.close() without return types