code: def _validate_dictionary(
      self, key_bytes: bytes, dictionary: DictionaryDHTValue
  ) -> bool:
      if self.record_validator is None:
          return True
  
      with dictionary.freeze():
          for subkey, (
              value_bytes,
              expiration_time,
          ) in dictionary.items():
              subkey_bytes = self.serializer.dumps(subkey)
              record = DHTRecord(
                  key_bytes, subkey_bytes, value_bytes, expiration_time
              )
              if not self.record_validator.validate(record):
                  return False
      return True
  
file_path: hivemind/hivemind/dht/protocol.py
imports: from __future__ import annotations
  import asyncio
  from typing import Collection, Dict, List, Optional, Sequence, Tuple, Union
  from hivemind.dht.crypto import DHTRecord, RecordValidatorBase
  from hivemind.dht.routing import DHTID, BinaryDHTValue, RoutingTable, Subkey
  from hivemind.dht.storage import DHTLocalStorage, DictionaryDHTValue
  from hivemind.p2p import P2P, P2PContext, PeerID, ServicerBase
  from hivemind.proto import dht_pb2
  from hivemind.utils import MSGPackSerializer, get_logger
  from hivemind.utils.auth import AuthorizerBase, AuthRole, AuthRPCWrapper
  from hivemind.utils.timed_storage import MAX_DHT_TIME_DISCREPANCY_SECONDS, DHTExpiration, ValueWithExpiration, get_dht_time
label_desc: Use image node_id 4 for calling the DHTProtocol obj's underlying member method code with example usage: obj._validate_dictionary(key_bytes, dictionary) and returns: True, True, False