src/main/java/org/nustaq/serialization/coders/FSTJsonDecoder.java
@Override
    public FSTClazzInfo readClass() throws IOException, ClassNotFoundException {
        if (lastDirectClass != null ) {
            FSTClazzInfo clInfo = conf.getCLInfoRegistry().getCLInfo(lastDirectClass, conf);
            lastDirectClass = null;
            return clInfo;
        }
        return null;
    }
@Override
    public FSTClazzInfo readClass() throws IOException, ClassNotFoundException {
        if (lastDirectClass != null ) {
            FSTClazzInfo clInfo = conf.getCLInfoRegistry().getCLInfo(lastDirectClass, conf);
            lastDirectClass = null;
            return clInfo;
        }
        return null;
    }
in case readClass already reads full minbin value