public Digester digest(Digestible digestible) {
        if (digestible != null) {
            digestible.digest(this);
        }
        return this;
    }
Updates the digest with an object that describes how it digests.
@param digestible the object
@return this digester
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/properties/Digester.java