protected static byte[] getRawUtf8Bytes(Deserializer buf) {
        int len = buf.getInt(null);
        return buf.getBytes(null, len);
    }
Creates an instance of a given class specification. All instantiation-type exceptions are consumed and
wrapped inside a runtime exception so that calling methods can let this propagate without declaring them
thrown.
vespajlib/src/main/java/com/yahoo/vespa/objects/Identifiable.java