}

    private boolean determineVersionMatch(String expectedVersion, String actualVersion) {
        String test = expectedVersion;
        boolean reverse = false;
        final boolean result;
        if (test.startsWith(REGEX_PREFIX)) {
            result = actualVersion.matches(test.substring(REGEX_PREFIX.length()));
        } else {
            if (test.startsWith("!")) {

    }

    private boolean determineVersionMatch(String expectedVersion, String actualVersion) {
        String test = expectedVersion;
        boolean reverse = false;
        final boolean result;
        if (test.startsWith(REGEX_PREFIX)) {
            result = actualVersion.matches(test.substring(REGEX_PREFIX.length()));
        } else {
            if (test.startsWith("!")) {

        return predicate.test(metadata);
    }

    private Predicate<JvmInstallationMetadata> languagePredicate() {
        return metadata -> {
            JavaLanguageVersion actualVersion = JavaToolchain.getJavaLanguageVersion(metadata);
            return actualVersion.equals(languageVersion);
        };
    }

    private boolean isJ9ExplicitlyRequested() {
        return jvmImplementation == JvmImplementation.J9;
    }