}

    @Override
    public ValueSetLink<K, V> getPredecessorInValueSet() {
      return requireNonNull(predecessorInValueSet); // see the comment on the class fields
    }

    @Override
    public ValueSetLink<K, V> getSuccessorInValueSet() {
      return requireNonNull(successorInValueSet); // see the comment on the class fields
    }

    @Override

  private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
    stream.defaultReadObject();
    keyTypeOrObjectUnderJ2cl = (Class<K>) requireNonNull(stream.readObject());
    valueTypeOrObjectUnderJ2cl = (Class<V>) requireNonNull(stream.readObject());
    setDelegates(
        new EnumMap<K, V>(keyTypeOrObjectUnderJ2cl), new EnumMap<V, K>(valueTypeOrObjectUnderJ2cl));

  private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
    stream.defaultReadObject();
    keyTypeOrObjectUnderJ2cl = (Class<K>) requireNonNull(stream.readObject());
    valueTypeOrObjectUnderJ2cl = (Class<V>) requireNonNull(stream.readObject());
    setDelegates(
        new EnumMap<K, V>(keyTypeOrObjectUnderJ2cl), new EnumMap<V, K>(valueTypeOrObjectUnderJ2cl));

      switch (balanceFactor()) {
        case -2:
          // requireNonNull is safe because right must exist in order to get a negative factor.
          requireNonNull(right);
          if (right.balanceFactor() > 0) {
            right = right.rotateRight();
          }
          return rotateLeft();
        case 2:
          // requireNonNull is safe because left must exist in order to get a positive factor.

    @Override
    public void write(Writer output, Map<String, Object> options, PersistedToolchains toolchains) throws IOException {
        Objects.requireNonNull(output, "output cannot be null");
        Objects.requireNonNull(toolchains, "toolchains cannot be null");

        try (Writer out = output) {
            new MavenToolchainsStaxWriter().write(out, toolchains.getDelegate());

              0,
              size,
              (e1, e2) -> {
                // requireNonNull is safe because the first `size` elements have been filled in.
                requireNonNull(e1);
                requireNonNull(e2);
                return comparator.compare(e1.getKey(), e2.getKey());
              });
          // requireNonNull is safe because the first `size` elements have been filled in.

        this.params = Objects.requireNonNull(params);
        return this;
    }

    public List<String> activeFeatures() {
        return activeFeatures;
    }

    public StoredLtrQueryBuilder activeFeatures(final List<String> activeFeatures) {
        this.activeFeatures = Objects.requireNonNull(activeFeatures);
        return this;
    }

        out.append(format.normalizeFirstWord(s.substring(i, j)));
      } else {
        requireNonNull(out).append(format.normalizeWord(s.substring(i, j)));
      }
      out.append(format.wordSeparator);
      i = j + wordSeparator.length();
    }
    return (i == 0)
        ? format.normalizeFirstWord(s)
        : requireNonNull(out).append(format.normalizeWord(s.substring(i))).toString();
  }

  /**

    if (effectiveRange.isEmpty()) {
      empty = true;
    } else {
      /*
       * requireNonNull is safe because the effectiveRange operations above would have thrown or
       * effectiveRange.isEmpty() would have returned true.
       */
      C afterLower = requireNonNull(range.lowerBound.leastValueAbove(domain));
      C beforeUpper = requireNonNull(range.upperBound.greatestValueBelow(domain));

import org.apache.maven.artifact.handler.DefaultArtifactHandler;
import org.apache.maven.eventspy.AbstractEventSpy;
import org.apache.maven.execution.ExecutionEvent;

import static java.util.Objects.requireNonNull;

/**
 */
@Named
@Singleton
public class DefaultArtifactHandlerManager extends AbstractEventSpy implements ArtifactHandlerManager {
    private final TypeRegistry typeRegistry;