}

    public static <L, R> Either<L, R> right(R value) {
        return new Right<>(value);
    }

    /**
     * Take the value if this is a left.
     */
    public abstract Optional<L> getLeft();

    /**
     * Take the value if this is a right.
     */
    public abstract Optional<R> getRight();

    /**
     * Map the left side.
     *
     * @see #mapRight
     * @see #fold
     */

                return person;
            }
        }
        return null;
    }

    public static Person of(Pair<String, String> pair) {
        return new Person(pair.getLeft(), pair.getRight());
    }

                return person;
            }
        }
        return null;
    }

    public static Person of(Pair<String, String> pair) {
        return new Person(pair.getLeft(), pair.getRight());
    }

        super(left.taskDependencyFactory, left.patternSetFactory);
        this.left = left;
        this.right = right;
    }

    public AbstractFileCollection getLeft() {
        return left;
    }

    public FileCollection getRight() {
        return right;
    }

    @Override
    public String getDisplayName() {
        return "file collection";
    }

    @Nullable
    public final R right;

    private Pair(@Nullable L left, @Nullable R right) {
        this.left = left;
        this.right = right;
    }

    @Nullable
    public L getLeft() {
        return left;
    }

    @Nullable
    public R getRight() {
        return right;
    }

    @Nullable
    public L left() {
        return left;
    }

    @Nullable

    }

    private static <T> boolean isIncubating(Pair<Attribute<T>, T> attributePair) {
        return isIncubating(Objects.requireNonNull(attributePair.getLeft()), attributePair.getRight());
    }

    private static <T> boolean isIncubatingAttributeInterface(Attribute<T> key) {
        return isAnnotatedWithIncubating(key.getType());
    }

        for (Pair<ModuleVersionIdentifier, ProjectComponentIdentifier> replacement : replacements) {
            replacementMap.put(replacement.getLeft().getModule(), replacement.getRight());
        }
    }

    @Override
    public void execute(DependencySubstitution sub) {

        final Pair<Collection<DaemonInfo>, Collection<DaemonInfo>> idleBusy = partitionByState(daemonRegistry.getAll(), Idle);
        final Collection<DaemonInfo> idleDaemons = idleBusy.getLeft();
        final Collection<DaemonInfo> busyDaemons = idleBusy.getRight();

        // Check to see if there are any compatible idle daemons

    public static CachingState disabledWithoutInputs(CachingDisabledReason reason) {
        return disabled(ImmutableList.of(reason), null, null);
    }

    public Optional<Enabled> whenEnabled() {
        return delegate.getLeft();
    }

    public Optional<Disabled> whenDisabled() {
        return delegate.getRight();
    }

    public <T> T fold(Function<Enabled, T> enabled, Function<Disabled, T> disabled) {

                warning.name, warning.valueClass, warning.exception
            );
        }
        for (Pair<String, String> entry : model.properties) {
            renderer.addProperty(entry.getLeft(), entry.getRight());
        }
    }

    /**
     * Model for the report.
     *
     * @since 7.6
     */
    @Incubating
    public static final class PropertyReportModel {