code: def get_server_url(self):
      return self._server_url
  
imports: import cgi
  import http.client
  import json
  import logging
  import mimetypes
  import os
  import tempfile
  from urllib.parse import quote_plus, urlparse
  import requests
label_desc: Use image node_id 3 for calling the MONAILabelClient obj's underlying member method code with example usage: obj.get_server_url() and returns: self