errors << "From non-null returning to null returning breaking change"
            } else if (oldNullability == Nullability.NON_NULL && newNullability == Nullability.UNMARKED) {
                errors << "From non-null returning to null-unmarked returning breaking change"

        IndexUpdateCallback callback = new TestIndexUpdateCallback();

        // Execute with null config
        dataStore.store(null, callback, params);

        assertTrue(storeCalled.get());
    }

    @Test
    public void test_store_withNullCallback() {
        // Test store with null callback
        final AtomicBoolean storeCalled = new AtomicBoolean(false);

        dataStore = new DataStore() {

            long id = 0;
            String line = null;
            while ((line = reader.readLine()) != null) {
                // Remove comments
                final String replacedLine = line.replaceAll("#.*$", StringUtil.EMPTY).trim();

                // Skip empty lines or comment lines
                if (replacedLine.length() == 0) {
                    if (updater != null) {
                        updater.write(line);

   * {@code get(null)}, {@code keySet().contains(null)} or {@code remove(null)}.
   */
  ALLOWS_NULL_KEY_QUERIES,
  ALLOWS_NULL_KEYS(ALLOWS_NULL_KEY_QUERIES),
  /**
   * The map does not throw {@code NullPointerException} on calls such as {@code
   * containsValue(null)}, {@code values().contains(null)} or {@code values().remove(null)}.
   */
  ALLOWS_NULL_VALUE_QUERIES,

        append(tags)
      }
      append('}')
    }

  open class Builder {
    internal var url: HttpUrl? = null
    internal var method: String
    internal var headers: Headers.Builder
    internal var body: RequestBody? = null
    internal var cacheUrlOverride: HttpUrl? = null
    internal var tags: Tags = EmptyTags

    constructor() {
      this.method = "GET"
      this.headers = Headers.Builder()

        // Check build/plugins
        Element buildElement = root.child(BUILD).orElse(null);
        if (buildElement != null) {
            Element pluginsElement = buildElement.child(PLUGINS).orElse(null);
            if (pluginsElement != null) {
                hasUpgrades |= upgradePluginsInSection(

     * @return A function that applies each function in the collection in order until a non-null result is found.
     *         If all functions return null, the composite function returns null.
     *
     * @throws NullPointerException if the input collection is null or contains null elements.
     */
    static UnaryOperator<String> chain(Collection<? extends UnaryOperator<String>> functions) {

        @Override
        public String getMimeType(String file) {
            return null;
        }

        @Override
        public java.util.Set<String> getResourcePaths(String path) {
            return null;
        }

        @Override
        public java.net.URL getResource(String path) {
            return null;
        }

        @Override

        if (httpClient == null) {
            init();
        }

        if (logger.isDebugEnabled()) {
            logger.debug("Accessing {}", url);
        }

        // start
        AccessTimeoutTarget accessTimeoutTarget = null;
        TimeoutTask accessTimeoutTask = null;
        if (accessTimeout != null) {

            return (DfFinalTimeZoneProvider) field.get(null);
        } catch (NoSuchFieldException e) {
            // Field might not exist in this version, return null
            return null;
        } catch (IllegalAccessException e) {
            // Cannot access field due to security restrictions
            return null;
        } catch (Exception e) {
            // Other errors, return null instead of throwing
            return null;