return "list"
    }

    @Override
    protected Class<? extends ImmutableCollection<?>> getImmutableCollectionType() {
        return ImmutableList.class
    }

    @Override
    protected List<String> toImmutable(Collection<String> values) {
        return ImmutableList.copyOf(values)
    }

    @Override
    protected List<String> toMutable(Collection<String> values) {
        return new ArrayList<String>(values)

        @Override
        public Isolatable<?> list(ImmutableList<Isolatable<?>> elements) {
            return new IsolatedList(elements);
        }

        @Override
        public Isolatable<?> set(ImmutableSet<Isolatable<?>> elements) {
            return new IsolatedSet(elements);
        }

        @Override
        public Isolatable<?> map(ImmutableList<MapEntrySnapshot<Isolatable<?>>> elements) {

   * subject to change.
   *
   * @since 2.0
   */
  public ImmutableList<E> asList() {
    switch (size()) {
      case 0:
        return ImmutableList.of();
      case 1:
        return ImmutableList.of(iterator().next());
      default:
        return new RegularImmutableAsList<>(this, toArray());
    }
  }

  /**

            previousExecutionState.getOriginMetadata().getExecutionTime(),
            execution,
            executionOutputState,
            ImmutableList.of(),
            previousExecutionState.getOriginMetadata()
        );
    }

    private UpToDateResult executeBecause(UnitOfWork work, ImmutableList<String> reasons, C context) {
        logExecutionReasons(reasons, work);
        AfterExecutionResult result = delegate.execute(work, context);

        entriesArray[i] = Multisets.immutableEntry(element, count);
      }
    }
    return new JdkBackedImmutableMultiset<>(
        delegateMap, ImmutableList.asImmutableList(entriesArray), size);
  }

  private JdkBackedImmutableMultiset(
      Map<E, Integer> delegateMap, ImmutableList<Entry<E>> entries, long size) {
    this.delegateMap = delegateMap;
    this.entries = entries;
    this.size = size;
  }

  @Override

package org.gradle.internal.execution.steps;

import com.google.common.collect.ImmutableList;
import org.gradle.internal.execution.UnitOfWork;

public class NeverUpToDateStep<C extends NonIncrementalCachingContext> implements Step<C, UpToDateResult> {
    // TODO Use a better explanation?
    private static final ImmutableList<String> NO_HISTORY = ImmutableList.of("No history is available.");

        private final ClassLoaderHierarchyHasher classLoaderHierarchyHasher;
        private ImplementationSnapshot implementation;
        private final ImmutableList.Builder<ImplementationSnapshot> additionalImplementations = ImmutableList.builder();

        public ImplementationsBuilder(ClassLoaderHierarchyHasher classLoaderHierarchyHasher) {
            this.classLoaderHierarchyHasher = classLoaderHierarchyHasher;

    EquivalenceTester.of(Equivalence.equals().<String>pairwise())
        .addEquivalenceGroup(ImmutableList.<String>of())
        .addEquivalenceGroup(ImmutableList.of("a"))
        .addEquivalenceGroup(ImmutableList.of("b"))
        .addEquivalenceGroup(ImmutableList.of("a", "b"), ImmutableList.of("a", "b"))
        .test();
  }

  public void testPairwiseEquivalent_equals() {
    new EqualsTester()

    List<Optional<String>> optionals =
        ImmutableList.of(Optional.of("a"), Optional.of("b"), Optional.of("c"));
    assertThat(Optional.presentInstances(optionals)).containsExactly("a", "b", "c").inOrder();
  }

  public void testPresentInstances_allAbsent() {
    List<Optional<Object>> optionals = ImmutableList.of(Optional.absent(), Optional.absent());

        }

        Map<Severity, ImmutableList<Problem>> problemsMap = problems.stream()
            .collect(
                groupingBy(p -> p.getDefinition().getSeverity(),
                    mapping(identity(), toImmutableList())));
        List<Problem> warnings = problemsMap.getOrDefault(WARNING, ImmutableList.of());
        List<Problem> errors = problemsMap.getOrDefault(ERROR, ImmutableList.of());

        if (!warnings.isEmpty()) {