// Use Call to initiate a clientside call.
func NewSingleHandler[Req, Resp RoundTripper](h HandlerID, newReq func() Req, newResp func() Resp) *SingleHandler[Req, Resp] {
	s := SingleHandler[Req, Resp]{id: h}
	s.newReq, s.recycleReq = recycleFunc[Req](newReq)
	s.newResp, s.recycleResp = recycleFunc[Resp](newResp)
	if _, ok := any(newReq()).(Recycler); ok {
		s.callReuseReq = true
	}
	return &s
}

        warmed.add(entryOf(entry.getKey(), newValue));
        Object newKey = new Object();
        assertThat(cache.asMap().put(newKey, entry.getValue())).isNull();
        // this getUnchecked() call shouldn't be a cache miss; verified below
        assertThat(cache.getUnchecked(entry.getKey())).isEqualTo(newValue);
        assertThat(cache.getUnchecked(newKey)).isEqualTo(entry.getValue());
        // don't let the new entry get GCed

    // [x509_extensions]
    // subjectAltName=DNS:localhost.localdomain,DNS:localhost,IP:127.0.0.1
    //
    // $ openssl req -x509 -nodes -days 36500 -subj '/CN=localhost' -config ./cert.cnf \
    //     -newkey rsa:512 -out cert.pem
    val certificate =
      certificate(
        """
        -----BEGIN CERTIFICATE-----
        MIIBWDCCAQKgAwIBAgIJANS1EtICX2AZMA0GCSqGSIb3DQEBBQUAMBQxEjAQBgNV

        DocMap docMap = new DocMap(parentMap);

        assertNull(docMap.put("newKey", "newValue"));
        assertEquals("newValue", docMap.get("newKey"));

        assertEquals("newValue", docMap.put("newKey", "updatedValue"));
        assertEquals("updatedValue", docMap.get("newKey"));

        assertNull(docMap.get("nonexistent"));
    }

    @Test
    public void test_remove() {

            // Create new lease
            Smb2LeaseKey newKey = new Smb2LeaseKey();
            LeaseEntry newEntry = new LeaseEntry(newKey, path, requestedState);
            leases.put(newKey, newEntry);
            pathToLease.put(path, newKey);

            log.debug("Created new lease for path: {} with key: {}", path, newKey);
            return newKey;
        } finally {
            lock.writeLock().unlock();

		}
		newKey, err := GlobalKMS.GenerateKey(ctx, &kms.GenerateKeyRequest{
			Name:           newKeyID,
			AssociatedData: kmsCtx,
		})
		if err != nil {
			return err
		}

		sealedKey := objectKey.Seal(newKey.Plaintext, crypto.GenerateIV(rand.Reader), crypto.S3KMS.String(), bucket, object)
		crypto.S3KMS.CreateMetadata(metadata, newKey.KeyID, newKey.Ciphertext, sealedKey, cryptoCtx)
		return nil

        assertTrue(keyManager.hasSessionKey(sessionId + ".v0"), "Archived key should exist");

        // New key should be different
        byte[] newKey = keyManager.getRawKey(sessionId);
        assertNotNull(newKey, "New key should exist");
        assertFalse(Arrays.equals(testKey, newKey), "New key should be different from old key");
    }

    @Test
    public void testMultipleKeyRotations() throws GeneralSecurityException {

            }
            
            // Create new lease
            Smb2LeaseKey newKey = new Smb2LeaseKey();
            LeaseEntry newEntry = new LeaseEntry(newKey, path, requestedState);
            leases.put(newKey, newEntry);
            pathToLease.put(path, newKey);
            
            return newKey;
        } finally {
            lock.writeLock().unlock();
        }
    }
    

        byte[] decrypted1 = context.decryptMessage(encrypted1);
        assertArrayEquals(plaintext1, decrypted1);

        // When - Rotate keys
        byte[] newKey = new byte[16];
        new SecureRandom().nextBytes(newKey);
        context.rotateKeys(newKey, newKey); // Use same key for test

        // Then - Can encrypt/decrypt with new keys
        byte[] plaintext2 = "After key rotation".getBytes();

      if (eventSubscribers == null) {
        CopyOnWriteArraySet<Subscriber> newSet = new CopyOnWriteArraySet<>();
        eventSubscribers =
            MoreObjects.firstNonNull(subscribers.putIfAbsent(eventType, newSet), newSet);
      }

      eventSubscribers.addAll(eventMethodsInListener);
    }
  }