@Override
    protected <T> void writeListTo(OutputStream out, List<T> messages, Schema<T> schema)
            throws IOException
    {
        JsonIOUtil.writeListTo(out, messages, schema, true);
    }
Testcase for ser/deser of multiple messages using json (numeric).

@author David Yu
@created Oct 8, 2010
protostuff-json/src/test/java/io/protostuff/JsonNumericRepeatedMessagesTest.java