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<>();

            if (o.isPresent()) {
                had++;
                items.addAll(o.get());
            }
        }
        return had == 0 ? Optional.empty() : Optional.of(List.copyOf(items));
    }

    protected Optional<Map<String, String>> collectMapIfPresentOrEmpty(
            Function<O, Optional<Map<String, String>>> getter) {
        int had = 0;

     */
    public <REQ extends Request<?>, REP extends Result<REQ>> BatchRequestException(
            String message, List<RequestResult<REQ, REP>> allResults) {
        super(message);
        this.results = List.copyOf(allResults);
    }

    /**
     * Returns the list of results from all requests that were part of the batch operation.
     * Each result contains the original request, the response (if successful), and any error

                    @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

                    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);

                    @Nullable RequestTrace trace,
                    @Nonnull Collection<ProducedArtifact> artifacts) {
                super(session, trace);
                this.artifacts = List.copyOf(requireNonNull(artifacts, "artifacts cannot be null"));
            }

            @Nonnull
            @Override
            public Collection<ProducedArtifact> getArtifacts() {
                return artifacts;

                    int retryFailedDeploymentCount) {
                super(session, trace);
                this.repository = requireNonNull(repository, "repository cannot be null");
                this.artifacts = List.copyOf(requireNonNull(artifacts, "artifacts cannot be null"));
                this.retryFailedDeploymentCount = retryFailedDeploymentCount;
            }

            @Nonnull
            @Override

        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();
    }

                    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) {