* If {@code null} is provided, defaults to {@link Nature#RELEASE_OR_SNAPSHOT}.
         *
         * @param nature the repository nature, or {@code null} to use the default
         * @return this builder, never {@code null}
         */
        public VersionResolverRequestBuilder nature(Nature nature) {
            this.nature = Objects.requireNonNullElse(nature, Nature.RELEASE_OR_SNAPSHOT);
            return this;
        }

            for (Restriction restriction : range.getRestrictions()) {
                if (isSnapshot(restriction.getLowerBound()) || isSnapshot(restriction.getUpperBound())) {
                    return RELEASE_OR_SNAPSHOT;
                }
            }
        }

        return RELEASE;
    }

    private boolean isSnapshot(ArtifactVersion version) {

     * It may contain following string values:
     * <ul>
     *     <li>"auto" - decision done based on range being resolver: if any boundary is snapshot, use "release_or_snapshot", otherwise "release"</li>
     *     <li>"release_or_snapshot" - the default</li>
     *     <li>"release" - query only release repositories to discover versions</li>
     *     <li>"snapshot" - query only snapshot repositories to discover versions</li>

    public Nature getNature() {
        if (metadata instanceof RepositoryMetadata repositoryMetadata) {
            return switch (repositoryMetadata.getNature()) {
                case RepositoryMetadata.RELEASE_OR_SNAPSHOT -> Nature.RELEASE_OR_SNAPSHOT;
                case RepositoryMetadata.SNAPSHOT -> Nature.SNAPSHOT;
                default -> Nature.RELEASE;
            };
        } else {
            return Nature.RELEASE;
        }

    }

    @Override
    public ArtifactRepositoryPolicy getPolicy(ArtifactRepository repository) {
        int nature = getNature();
        if ((nature & RepositoryMetadata.RELEASE_OR_SNAPSHOT) == RepositoryMetadata.RELEASE_OR_SNAPSHOT) {
            ArtifactRepositoryPolicy policy = new ArtifactRepositoryPolicy(repository.getReleases());
            policy.merge(repository.getSnapshots());
            return policy;

                    if (lowerArtifact != null && lowerArtifact.isSnapshot()
                            || upperArtifact != null && upperArtifact.isSnapshot()) {
                        wantedNature = Metadata.Nature.RELEASE_OR_SNAPSHOT;
                    } else {
                        wantedNature = Metadata.Nature.RELEASE;
                    }
                } else {