import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
import java.util.stream.Collectors;

import static java.util.Comparator.reverseOrder;

/**
 * This class ensures that the release notes index page has the appropriate anchors and include directives
 * for the current repository version.
 */
public class ReleaseNotesIndexGenerator {

import static java.util.Arrays.asList;
import static java.util.Collections.singleton;
import static java.util.Comparator.comparing;
import static java.util.Comparator.naturalOrder;
import static java.util.Comparator.reverseOrder;

import com.google.common.annotations.GwtCompatible;
import com.google.common.testing.EqualsTester;
import java.util.Collections;
import java.util.Comparator;
import java.util.Optional;

import static java.util.Arrays.asList;
import static java.util.Collections.singleton;
import static java.util.Comparator.comparing;
import static java.util.Comparator.naturalOrder;
import static java.util.Comparator.reverseOrder;

import com.google.common.annotations.GwtCompatible;
import com.google.common.testing.EqualsTester;
import java.util.Collections;
import java.util.Comparator;
import java.util.Optional;

        Map<QualifiedVersion, Set<ChangelogEntry>> changelogsByVersion
    ) {
        Map<QualifiedVersion, Map<String, Map<String, List<ChangelogEntry>>>> changelogsByVersionByTypeByArea = new TreeMap<>(
            Comparator.reverseOrder()
        );

        changelogsByVersion.forEach((version, changelogs) -> {
            Map<String, Map<String, List<ChangelogEntry>>> changelogsByTypeByArea = changelogs.stream()
                .collect(

            } finally {
                // Clean up - delete all files in the directory first
                try {
                    Files.walk(tempDir)
                            .sorted(java.util.Comparator.reverseOrder())
                            .forEach(path -> {
                                try {
                                    Files.deleteIfExists(path);
                                } catch (Exception e) {

  }

  @Override
  ImmutableSortedSet<E> createDescendingSet() {
    Comparator<? super E> reversedOrder = Collections.reverseOrder(comparator);
    return isEmpty()
        ? emptySet(reversedOrder)
        : new RegularImmutableSortedSet<E>(elements.reverse(), reversedOrder);
  }

  // redeclare to help optimizers with b/310253115
  @SuppressWarnings("RedundantOverride")
  @Override

            }
            return;
        }
        try (Stream<Path> walk = Files.walk(dir, FileVisitOption.FOLLOW_LINKS)) {
            walk.sorted(Comparator.reverseOrder()).forEach(f -> {
                if (logger.isDebugEnabled()) {
                    logger.debug("Deleting: path={}", f);
                }
                try {
                    Files.delete(f);

    return elements;
  }

  @Override
  ImmutableSortedSet<E> createDescendingSet() {
    Comparator<? super E> reversedOrder = Collections.reverseOrder(comparator);
    return isEmpty()
        ? emptySet(reversedOrder)
        : new RegularImmutableSortedSet<E>(elements.reverse(), reversedOrder);
  }

  // redeclare to help optimizers with b/310253115
  @SuppressWarnings("RedundantOverride")
  @Override

            } finally {
                // Clean up - delete all files in the directory first
                try {
                    Files.walk(tempDir)
                            .sorted(java.util.Comparator.reverseOrder())
                            .forEach(path -> {
                                try {
                                    Files.deleteIfExists(path);
                                } catch (Exception e) {