* cache-control headers.
     */
    open fun cacheControl(cacheControl: CacheControl): Builder {
      val value = cacheControl.toString()
      return when {
        value.isEmpty() -> removeHeader("Cache-Control")
        else -> header("Cache-Control", value)
      }
    }

    open fun get(): Builder = method("GET", null)

    open fun head(): Builder = method("HEAD", null)

        List<KerberosAuthData> authorizations = relevantAuthData.getAuthorizations();
        assertNotNull(authorizations, "The authorizations list should not be null.");
        assertTrue(authorizations.isEmpty(), "The authorizations list should be empty.");
    }

    /**
     * Test the getAuthorizations method.
     *
     * @throws IOException if ASN.1 encoding fails.

        assertTrue(endLatch.await(30, TimeUnit.SECONDS), "All threads should complete");
        executor.shutdown();

        // Then - All operations should succeed
        assertTrue(exceptions.isEmpty(), "No exceptions should occur");
        assertEquals(threadCount * opsPerThread, successCount.get(), "All operations should succeed");
    }

    /**
     * Test that buffer cache handles allocation when cache is full.

      assertWithMessage("%s to %s", from, from).that(from.to(from, "foo")).isSameInstanceAs("foo");
      for (CaseFormat to : CaseFormat.values()) {
        assertWithMessage("%s to %s", from, to).that(from.to(to, "")).isEmpty();
        assertWithMessage("%s to %s", from, to).that(from.to(to, " ")).isEqualTo(" ");
      }
    }
  }

  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester
  public void testNullArguments() {

        insertContentElement(parent, GROUP_ID, groupId);
        insertContentElement(parent, ARTIFACT_ID, artifactId);
        if (version != null && !version.isEmpty()) {
            insertContentElement(parent, VERSION, version);
        }
    }

    /**
     * Convenience method to create a dependency element with GAV.
     *

        assertFalse(manager.isUseMultiChannel());
    }

    @Test
    void testGetHealthyChannels() throws UnknownHostException {
        assertTrue(channelManager.getHealthyChannels().isEmpty());

        // Add a healthy channel manually for testing
        InetAddress addr = InetAddress.getByName("192.168.1.100");
        NetworkInterfaceInfo localInterface = new NetworkInterfaceInfo(addr, 1000);

    }

    @Override
    public String getContentType(final InputStream is, final Map<String, String> params) {
        final String filename = params.get(ExtractData.RESOURCE_NAME_KEY);
        if (StringUtil.isEmpty(filename) && is == null) {
            throw new MimeTypeException("Cannot detect MIME type: both filename and input stream are empty. At least one is required.");
        }

        final Metadata metadata = new Metadata();

        if (body.documents == null) {
            throwValidationErrorApi(messages -> messages.addErrorsCrudFailedToCreateCrudTable(GLOBAL, "documents is required."));
        }
        if (body.documents.isEmpty()) {
            throwValidationErrorApi(messages -> messages.addErrorsCrudFailedToCreateCrudTable(GLOBAL, "documents is empty."));
        }
        final String indexFieldId = fessConfig.getIndexFieldId();

        Model model = builder.build(session, project, Sources.buildSource(file));

        assertNotNull(model);
        assertTrue(model.getProfiles().isEmpty());
    }

    @Test
    void testScmInheritance() throws Exception {
        Model model = Model.newBuilder()
                .scm(Scm.newBuilder()

          @Override
          public @Nullable Object getIfPresent(Object key) {
            return null;
          }
        };

    assertThat(cache.getAllPresent(ImmutableList.of(new Object()))).isEmpty();
  }

  public void testGetAllPresent_cached() {
    Object cachedKey = new Object();
    Object cachedValue = new Object();
    Cache<Object, Object> cache =
        new AbstractCache<Object, Object>() {