public static <T> void mergeFrom(byte[] data, int offset, int length,
            T message, Schema<T> schema) throws IOException
    {
        GraphIOUtil.mergeFrom(data, offset, length, message, schema);
    }
Test ser/deser of graph objects (references and cyclic dependencies).

@author David Yu
@created Dec 10, 2010
protostuff-core/src/test/java/io/protostuff/GraphTest.java