class_docstr: The World Air Quality handler implementation
class_docstr_tok: ["The","World","Air","Quality","handler","implementation"]
docstr: Check connection to the handler.
  
  Returns
  -------
  StatusResponse
      Status confirmation
docstr_tok: ["Check","connection","to","the","handler",".","Returns","--","--","--","-","StatusResponse","Status","confirmation"]
code: def check_connection(self) -> StatusResponse:
      """Check connection to the handler.
  
      Returns
      -------
      StatusResponse
          Status confirmation
      """
      response = self.connect()
      self.is_connected = response.success
      return response
  
file_path: mindsdb/mindsdb/integrations/handlers/aqicn_handler/aqicn_handler.py
imports: from collections import OrderedDict
  from mindsdb.integrations.handlers.aqicn_handler.aqicn_tables import AQByUserLocationTable, AQByCityTable, AQByLatLngTable, AQByNetworkStationTable
  from mindsdb.integrations.handlers.aqicn_handler.aqicn import AQIClient
  from mindsdb.integrations.libs.api_handler import APIHandler
  from mindsdb.integrations.libs.response import HandlerStatusResponse
  from mindsdb.integrations.libs.const import HANDLER_CONNECTION_ARG_TYPE
  from mindsdb.utilities import log
  from mindsdb_sql import parse_sql
label_desc: Use image node_id 3 for calling the AQICNHandler obj's underlying member method code with example usage: obj.check_connection() and returns: response