HashSet<BuildStep> preds = new HashSet<>();
        nonEmptyPredecessors(step, preds, new HashSet<>());
        return preds.stream();
    }

    private void nonEmptyPredecessors(BuildStep step, Set<BuildStep> preds, Set<BuildStep> visited) {
        if (visited.add(step)) {
            step.predecessors.forEach(ch -> {
                if (ch.executions().findAny().isPresent()) {
                    preds.add(ch);

        }

        final DependencySet runtimeDependencies = runtimeConfiguration.getAllDependencies();
        final Set<String> packages = new HashSet<>();
        final Set<String> nodes = new HashSet<>();
        final Set<String> nodeIds = new HashSet<>();
        for (final Dependency dependency : runtimeDependencies) {
            final String id = dependency.getGroup() + ":" + dependency.getName();

                }
            }
            newArtifacts.add(artifact);
        }
        return newArtifacts;
    }

    @SuppressWarnings("unchecked")
    private Set<String> needsInlining(RepositorySystemSession session) {
        return (Set<String>) session.getData()
                .computeIfAbsent(
                        PomInlinerTransformer.class.getName() + ".needsInlining", ConcurrentHashMap::newKeySet);
    }

        implements ProjectArtifactsCache.ArtifactsSetWithResult {
    final DependencyResolutionResult result;
    final Set<Artifact> artifacts;

    public SetWithResolutionResult(DependencyResolutionResult result, Set<Artifact> artifacts) {
        this.result = result;
        this.artifacts = Collections.unmodifiableSet(artifacts);
    }

    @Override
    public Iterator<Artifact> iterator() {

	// trying to pool FS backend into an Erasure set.
	if err = checkFormatErasureValues(formatConfigs, storageDisks, setDriveCount); err != nil {
		return nil, err
	}

	// All disks report unformatted we should initialized everyone.
	if shouldInitErasureDisks(sErrs) && firstDisk {
		logger.Info("Formatting %s pool, %v set(s), %v drives per set.",
			humanize.Ordinal(poolCount), setCount, setDriveCount)

    }

    @Override
    public Iterable<E> order(List<E> insertionOrder) {
      return gen.order(insertionOrder);
    }
  }

  private static Set<Feature<?>> computeReserializedCollectionFeatures(Set<Feature<?>> features) {
    Set<Feature<?>> derivedFeatures = new HashSet<>(features);
    derivedFeatures.remove(SERIALIZABLE);
    derivedFeatures.remove(SERIALIZABLE_INCLUDING_VIEWS);
    return derivedFeatures;

   * gets invoked from other immutable collections.
   */
  public void testDoesntCheckForNull() {
    ImmutableSet<Integer> set = ImmutableSet.of(1, 2, 3);
    ImmutableList<Integer> unused =
        new RegularImmutableAsList<Integer>(set, new @Nullable Object[] {null, null, null});
    // shouldn't throw!
  }

import com.google.common.collect.ImmutableSet;
import java.util.HashSet;
import java.util.Set;
import org.jspecify.annotations.NullUnmarked;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

@RunWith(JUnit4.class)
@NullUnmarked
public final class InvalidatableSetTest {
  Set<Integer> wrappedSet;
  Set<Integer> copyOfWrappedSet;
  InvalidatableSet<Integer> setToTest;

  @Before

import java.lang.annotation.RetentionPolicy;
import java.util.Set;

/**
 * Optional features of classes derived from {@code Multimap}.
 *
 * @author Louis Wasserman
 */
@SuppressWarnings("rawtypes") // maybe avoidable if we rework the whole package?
@GwtCompatible
public enum MultimapFeature implements Feature<Multimap> {
  VALUE_COLLECTIONS_SUPPORT_ITERATOR_REMOVE;

  private final Set<Feature<? super Multimap>> implied;

        this.artifactFactory = artifactFactory;
    }

    @Override
    public Set<Artifact> createArtifacts(MavenProject project) throws InvalidDependencyVersionException {
        return createArtifacts(artifactFactory, project.getDependencies(), null, null, project);
    }

    public static Set<Artifact> createArtifacts(
            ArtifactFactory artifactFactory,
            List<Dependency> dependencies,