code: def _close_and_clean(self, cleanup):
          
  
          tasks = []
          for node in self._nodes:
              tasks.append(asyncio.async(node.manager.close_node(node.id)))
  
          if tasks:
              done, _ = yield from asyncio.wait(tasks)
              for future in done:
                  try:
                      future.result()
                  except (Exception, GeneratorExit) as e:
                      log.error("Could not close node {}".format(e), exc_info=1)
  
          if cleanup and os.path.exists(self.path):
              self._deleted = True
              try:
                  yield from wait_run_in_executor(shutil.rmtree, self.path)
                  log.info("Project {id} with path '{path}' deleted".format(path=self._path, id=self._id))
              except OSError as e:
                  raise aiohttp.web.HTTPInternalServerError(text="Could not delete the project directory: {}".format(e))
          else:
              log.info("Project {id} with path '{path}' closed".format(path=self._path, id=self._id))
  
          if self._used_tcp_ports:
              log.warning("Project {} has TCP ports still in use: {}".format(self.id, self._used_tcp_ports))
          if self._used_udp_ports:
              log.warning("Project {} has UDP ports still in use: {}".format(self.id, self._used_udp_ports))
  
          # clean the remaining ports that have not been cleaned by their respective node.
          port_manager = PortManager.instance()
          for port in self._used_tcp_ports.copy():
              port_manager.release_tcp_port(port, self)
          for port in self._used_udp_ports.copy():
              port_manager.release_udp_port(port, self)
docs: Closes the project, and cleanup the disk if cleanup is True
  
          :param cleanup: Whether to delete the project directory