code: def Update(self, request, context):
      result = None
      try:
          args = json.loads(request.args)
          df = pickle.loads(request.df)
          logger.info(
              "%s.Update: args - %s",
              self.__class__.__name__,
              args,
          )
  
          handler = self._get_handler(request.context)
          handler.update(df, args)
  
          result = common_pb2.StatusResponse(
              success=True, error_message=""
          )
  
      except Exception:
          msg = traceback.format_exc()
          logger.error(
              "%s.Update: error - %s", self.__class__.__name__, msg
          )
          result = common_pb2.StatusResponse(
              success=False, error_message=msg
          )
  
      return result
  
imports: import json
  import pickle
  import traceback
  from concurrent import futures
  import grpc
  from mindsdb.microservices_grpc.ml import ml_pb2_grpc
  from mindsdb.microservices_grpc.ml import ml_pb2, common_pb2
  from mindsdb.interfaces.storage.model_fs import ModelStorage, HandlerStorage
  from mindsdb.integrations.libs.response import RESPONSE_TYPE
  from mindsdb.interfaces.database.integrations import integration_controller
  from mindsdb.integrations.libs.handler_helpers import get_handler
  from mindsdb.utilities.context import context
  from mindsdb.utilities import log
label_desc: Use image node_id 7 for calling the MLServiceServicer obj's underlying member method code with example usage: obj.Update(request, context) and returns: result