@TemplateExtension
public class JavaExtensions {

    public static String mimeType(byte[] bytes) {
        if (bytes == null || bytes.length == 0) {
            return null;
        }
        return FileUtils.getMimeType("", bytes);
    }

}

    static boolean isAssignableFrom(DotName className1, DotName className2, IndexView index,
            Map<DotName, AssignableInfo> assignableCache) {
        // java.lang.Object is assignable from any type
        if (className1.equals(DotNames.OBJECT)) {
            return true;
        }
        // type1 is the same as type2
        if (className1.equals(className2)) {
            return true;
        }
        ClassInfo class1 = index.getClassByName(className1);
        AssignableInfo assignableInfo = assignableCache.get(className1);
        if (assignableInfo == null) {
            // No cached info
            assignableInfo = AssignableInfo.from(class1, index);
            assignableCache.put(className1, assignableInfo);
            return assignableInfo.isAssignableFrom(className2);
        } else {
            if (assignableInfo.isAssignableFrom(className2)) {
                return true;
            }
            // Cached info does not match - try to update the assignable info (a computing index is used)
            assignableInfo = AssignableInfo.from(class1, index);
            if (assignableInfo.isAssignableFrom(className2)) {
                // Update the cache
                assignableCache.put(className1, assignableInfo);
                return true;
            }
        }
        return false;
    }