code: def get_answer(self, request_id, opcode, msg_bytes):
      if opcode not in self.server.operationsHandlersMap:
          raise NotImplementedError(f"Unknown opcode {opcode}")
      responder = self.server.operationsHandlersMap[opcode]
      assert responder is not None, "error"
      try:
          response = responder.handle(
              msg_bytes,
              request_id,
              self.session.mindsdb_env,
              self.session,
          )
          if response is None:
              return None
      except Exception as e:
          logger.error(e)
          response = {
              "ok": 0,
              "errmsg": f"{str(e)} : {traceback.format_exc()}",
              "code": 2,
              "codeName": "BadValue",
          }
          return responder.to_bytes(response, request_id, is_error=True)
  
      return responder.to_bytes(response, request_id)
  
imports: import socketserver
  import socket
  import struct
  import bson
  import traceback
  from bson import codec_options
  from collections import OrderedDict
  from abc import abstractmethod
  from bson.codec_options import CodecOptions
  from bson.codec_options import TypeCodec
  from bson.codec_options import TypeRegistry
  import numpy
  import datetime
  import mindsdb.api.mongo.functions
  from mindsdb.api.mongo.classes import RespondersCollection, Session
  from mindsdb.interfaces.storage import db
  from mindsdb.interfaces.model.model_controller import ModelController
  from mindsdb.interfaces.database.integrations import integration_controller
  from mindsdb.interfaces.database.projects import ProjectController
  from mindsdb.interfaces.database.database import DatabaseController
  from mindsdb.utilities.context import context
  from mindsdb.utilities import log
label_desc: Use image node_id 3 for calling the MongoRequestHandler obj's underlying member method code with example usage: obj.get_answer(request_id, opcode, msg_bytes) and returns: responder, None, responder