RoleCQ cq = new RoleCQ();
        if (queryLambda != null) {
            queryLambda.callback(cq);
        }
        FilterAggregationBuilder builder = regFilterA(name, cq.getQuery());
        if (opLambda != null) {
            opLambda.callback(builder);
        }
        if (aggsLambda != null) {
            RoleCA ca = new RoleCA();
            aggsLambda.callback(ca);

```

### Type Conversion
```java
import org.codelibs.core.convert.*;

// Safe type conversions with null handling
Integer value = IntegerConversionUtil.toInteger("123");        // Returns 123
Integer nullValue = IntegerConversionUtil.toInteger(null);     // Returns null
Boolean flag = BooleanConversionUtil.toBoolean("true");        // Returns true
Date date = DateConversionUtil.toDate("2023-12-25", "yyyy-MM-dd");

    }

    @Override
    public int hashCode() {
        int hash = 17;
        hash = hash * 31 + (buildReactor == null ? 0 : buildReactor.hashCode());
        hash = hash * 31 + (ideWorkspace == null ? 0 : ideWorkspace.hashCode());
        hash = hash * 31 + (userLocalArtifactRepository == null ? 0 : userLocalArtifactRepository.hashCode());

        return hash;
    }

    @Override

        if (event == null) {
            return null;
        } else {
            String wagon = event.getWagon().getClass().getName();

            ArtifactTransferResource artifact = wrap(event.getWagon().getRepository(), event.getResource());

            ArtifactTransferEvent evt;
            if (event.getException() != null) {

        this(modelId, location, null);
    }

    public InputSource(String modelId, String location, InputLocation importedFrom) {
        this.modelId = modelId;
        this.location = location;
        this.inputs = null;
        this.importedFrom = importedFrom;
    }

    public InputSource(Collection<InputSource> inputs) {
        this.modelId = null;
        this.location = null;

    expected[getNullLocation()] = entry(null, v3());
    expectContents(expected);
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS})
  public void testComputeIfPresent_nullKeySupportedAbsent() {
    assertNull(
        "computeIfPresent(null, function) should return null",
        getMap()
            .computeIfPresent(
                null,
                (k, v) -> {

    }

    @Test
    @DisplayName("writeBytesWireFormat with null path returns minimal bytes")
    void testWriteWhenPathIsNull() {
        // When path is null, Strings.getOEMBytes returns empty array, not NPE
        when(mockConfig.getOemEncoding()).thenReturn("windows-1252");
        SmbComQueryInformation nullPathCmd = new SmbComQueryInformation(mockConfig, null);
        byte[] buffer = new byte[50];

                final String mimeType = mimeTypeHelper.getContentType(null, filename);
                if (mimeType != null) {
                    final Extractor extractor = extractorFactory.getExtractor(mimeType);
                    if (extractor != null) {
                        InputStream is = null;
                        try {
                            is = lhaFile.getInputStream(head);

            @Override
            protected SmbResource adapt(FileEntry e) throws MalformedURLException {
                return null;
            }
        };

        // When all entries return null, iterator should be empty
        assertFalse(iterator.hasNext());
        assertNull(iterator.next());
    }

        // Given - Various invalid buffers
        byte[] nullBuffer = null;
        byte[] wrongSizeBuffer = new byte[100]; // Wrong size
        byte[] correctBuffer = new byte[SmbComTransaction.TRANSACTION_BUF_SIZE];

        // When/Then - Should handle invalid buffers gracefully
        assertDoesNotThrow(() -> {
            BufferCache.releaseBuffer(nullBuffer); // Should ignore null