code: def test_get_empty():
      d = DHTLocalStorage()
      assert (
          d.get(DHTID.generate(source="key")) is None
      ), "DHTLocalStorage returned non-existent value"
  
file_path: hivemind/tests/test_dht_storage.py
imports: import time
  from hivemind.dht.storage import DHTID, DHTLocalStorage, DictionaryDHTValue
  from hivemind.utils.serializer import MSGPackSerializer
  from hivemind.utils.timed_storage import get_dht_time
label_desc: Use image node_id 3 for calling a global function with example usage: test_get_empty() without return types