}
                    if (isMultiReleaseJar == null && JarUtil.isManifestName(entryName)) {
                        isMultiReleaseJar = JarUtil.isMultiReleaseJarManifest(JarUtil.readManifest(entry.getContent()));
                    }
                }
            } catch (FileException e) {
                // Ignore malformed archive, let the transformation handle it.

        try {
            Manifest parsedManifest = JarUtil.readManifest(manifestEntry.getContent());
            if (!JarUtil.isMultiReleaseJarManifest(parsedManifest)) {
                // If the original JAR is not multi-release, we don't need the manifest in the transformed JAR at all.
                return;
            }
            isMultiReleaseJar = true;

     *
     * @param manifest the manifest
     * @return {@code true} if the manifest declares the multi-release JAR
     */
    public static boolean isMultiReleaseJarManifest(Manifest manifest) {
        return Boolean.parseBoolean(getManifestMainAttribute(manifest, MULTI_RELEASE_ATTRIBUTE));
    }

    @Nullable