class_docstr: Base class for server nodes in a distributed cluster.
code: def versions(self, packages=None):
      return get_versions(packages=packages)
  
imports: from __future__ import annotations
  import logging
  import ssl
  import warnings
  import weakref
  from contextlib import suppress
  import tlz
  from tornado.httpserver import HTTPServer
  import dask
  from distributed.comm import get_address_host, get_tcp_server_addresses
  from distributed.core import Server
  from distributed.http.routing import RoutingApplication
  from distributed.utils import DequeHandler, clean_dashboard_address
  from distributed.versions import get_versions
label_desc: Use image node_id 1 for calling the ServerNode obj's underlying member method code with example usage: obj.versions(packages) and returns: get_versions