public UpgradeResult {
        // Defensive copying to ensure immutability
        processedPoms = Set.copyOf(processedPoms);
        modifiedPoms = Set.copyOf(modifiedPoms);
        errorPoms = Set.copyOf(errorPoms);
    }

    /**
     * Creates a successful result with the specified processed and modified POMs.
     */

                sut.getOptionalProjectsBySelectors(mavenExecutionRequest, listOfProjects, selectors);

        assertEquals(1, optionalProjectsBySelectors.size());
        assertEquals(List.of(mavenProject), List.copyOf(optionalProjectsBySelectors));
    }

    @Test
    void getRequiredProjectsBySelectorsThrowsMavenExecutionException() {
        final HashSet<String> selectors = new HashSet<>();

                    @Nonnull Collection<? extends ArtifactCoordinates> coordinates,
                    @Nonnull List<RemoteRepository> repositories) {
                super(session, trace);
                this.coordinates = List.copyOf(requireNonNull(coordinates, "coordinates cannot be null"));
                this.repositories = validate(repositories);
            }

            @Nonnull
            @Override

                    return 0;
                }
            };
        }
    };

    static <E1, E2 extends E1> List<E1> copy(Collection<E2> collection) {
        return collection == null ? List.of() : List.copyOf(collection);
    }

    static <K, V> Map<K, V> copy(Map<K, V> map) {
        if (map == null) {
            return emptyMap();
        } else if (map instanceof AbstractImmutableMap) {

                    Path rootDirectory) {
                this.userProperties = Map.copyOf(userProperties);
                this.systemProperties = Map.copyOf(systemProperties);
                Map<String, String> cp = new HashMap<>(systemProperties);
                cp.putAll(userProperties);
                this.effectiveProperties = Map.copyOf(cp);
                this.startTime = requireNonNull(startTime);

        for (CoreExtension source : selectedExtensions.values()) {
            context.logger.debug("* " + source.getId() + ": " + formatLocation(source.getLocation("")));
        }
        return List.copyOf(selectedExtensions.values());
    }

    protected String formatLocation(InputLocation location) {
        return location.getSource().getLocation() + ":" + location.getLineNumber();
    }

                this.profiles = profiles != null ? List.copyOf(profiles) : List.of();
                this.activeProfileIds = activeProfileIds != null ? List.copyOf(activeProfileIds) : List.of();
                this.inactiveProfileIds = inactiveProfileIds != null ? List.copyOf(inactiveProfileIds) : List.of();
                this.systemProperties =
                        systemProperties != null ? Map.copyOf(systemProperties) : session.getSystemProperties();

            return this;
        }

        public ParserRequest build() {
            return new ParserRequestImpl(
                    command,
                    commandName,
                    List.copyOf(args),
                    lookup.lookupOptional(Logger.class).orElse(logger),
                    messageBuilderFactory,
                    lookup,
                    cwd,
                    mavenHome,

        loaded = readCoreExtensionsDescriptorFromFile(file, true);
        if (!loaded.isEmpty()) {
            result.add(new CoreExtensions(file, loaded));
        }

        return result.isEmpty() ? null : List.copyOf(result);
    }

    protected List<CoreExtension> readCoreExtensionsDescriptorFromFile(Path extensionsFile, boolean allowMetaVersions) {
        try {

            MavenProject child2Project = result2.getProject();

            // Capture repositories after building child2
            List<ArtifactRepository> repositoriesAfterChild2 = List.copyOf(sharedRequest.getRemoteRepositories());

            // Verify that child1 has its own repository
            boolean child1HasOwnRepo = child1Project.getRemoteArtifactRepositories().stream()