code: def start(self):
      if not self.__unpacked_dir:
          self._unpack()
      popen = subprocess.Popen(
          ["typedb", "server"],
          cwd=os.path.join(
              self.__unpacked_dir, self.__distribution_root_dir
          ),
      )
      sleep(5)
      self.__pid = popen.pid
  
imports: from __future__ import print_function
  import os
  import shutil
  import subprocess
  import subprocess
  import tarfile
  import tempfile
  import zipfile
  from time import sleep
label_desc: Use image node_id 4 for calling the TypeDBServer obj's underlying member method code with example usage: obj.start() without return types