};
    }

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

    private boolean isJ9RequestedViaVendor() {
        return vendorSpec != DefaultJvmVendorSpec.any() && vendorSpec.test(JvmVendor.KnownJvmVendor.IBM.asJvmVendor());
    }

    private Predicate<JvmInstallationMetadata> vendorPredicate() {