new TestStringCollectionGenerator() {
              @Override
              public Collection<String> create(String[] elements) {
                // TODO: MinimalCollection should perhaps throw
                for (Object element : elements) {
                  if (element == null) {
                    throw new NullPointerException();
                  }
                }
                return MinimalCollection.of(elements);

`optionalOldSelf` API field in CustomResourceDefinition validation rules, which should only be allowed to be set when the CRDValidationRatcheting feature gate is enabled. Existing CustomResourceDefinition objects which have the field set will retain it on update, but new CustomResourceDefinition objects will not be permitted to set the field while the CRDValidationRatcheting feature gate is disabled. ([#122343](https://github.com/kubernetes/kubernetes/pull/122343), [@jpbetz](https://github.com/jpbetz))...

 */
package org.apache.maven.repository;

import java.util.ArrayList;
import java.util.Collection;

/**
 * This is the main graph data structure used by the RepositorySystem to present tree and graph objects.
 *
 *
 */
@Deprecated
public class MetadataGraph {
    /** all graph nodes */
    Collection<MetadataGraphNode> nodes;

    /** entry point for tree-like structures */
    MetadataGraphNode entry;

     */
    public boolean hasFailure() {
        return !failures.isEmpty();
    }

    /**
     * Returns the list of failures.
     *
     * @return a List of Throwable objects representing the failures
     */
    public List<Throwable> getFailures() {
        return failures;
    }

    }

    @Override
    public CrawlingInfoDbm asDBMeta() {
        return CrawlingInfoDbm.getInstance();
    }

    @Override
    protected <RESULT extends CrawlingInfo> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setCreatedTime(DfTypeUtil.toLong(source.get("createdTime")));

    }

    @Override
    public ElevateWordDbm asDBMeta() {
        return ElevateWordDbm.getInstance();
    }

    @Override
    protected <RESULT extends ElevateWord> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setBoost(DfTypeUtil.toFloat(source.get("boost")));

    }

    @Override
    public PathMappingDbm asDBMeta() {
        return PathMappingDbm.getInstance();
    }

    @Override
    protected <RESULT extends PathMapping> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));

        // Test constructor with cause only
        Exception cause = new NullPointerException("Query object is null");

        SearchQueryException exception = new SearchQueryException(cause);

        assertEquals(cause, exception.getCause());
        assertEquals("java.lang.NullPointerException: Query object is null", exception.getMessage());
        assertTrue(exception instanceof FessSystemException);
    }

        Object[][] testData = { { "\\pipe\\srvsvc", "srvsvc", "4B324FC8-1670-01D3-1278-5A47BF6EE188", 3, 0 },
                { "\\pipe\\lsarpc", "lsarpc", "12345778-1234-ABCD-EF00-0123456789AB", 2, 1 },
                { "\\pipe\\samr", "samr", "12345778-1234-ABCD-EF00-0123456789AC", 1, 0 } };

        for (Object[] data : testData) {
            String endpoint = (String) data[0];

    }

    @Override
    public ScheduledJobDbm asDBMeta() {
        return ScheduledJobDbm.getInstance();
    }

    @Override
    protected <RESULT extends ScheduledJob> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setAvailable(DfTypeUtil.toBoolean(source.get("available")));