code: def _gzip(bytestring):
      out = io.BytesIO()
      # Set mtime to zero for deterministic results across TensorBoard launches.
      with gzip.GzipFile(
          fileobj=out, mode="wb", compresslevel=3, mtime=0
      ) as f:
          f.write(bytestring)
      return out.getvalue()
  
imports: import argparse
  import functools
  import gzip
  import io
  import mimetypes
  import posixpath
  import zipfile
  from werkzeug import utils
  from werkzeug import wrappers
  from tensorboard import plugin_util
  from tensorboard.backend import http_util
  from tensorboard.plugins import base_plugin
  from tensorboard.util import grpc_util
  from tensorboard.util import tb_logging
  from tensorboard import version
label_desc: Use image node_id 1 for calling a global function with example usage: _gzip(bytestring) and returns: out