@Override
    protected <T> byte[] toByteArray(T message, Schema<T> schema)
    {
        return JsonIOUtil.toByteArray(message, schema, isNumeric());
    }
Test json ser/deser for runtime {@link Map} fields.

@author David Yu
@created Jan 22, 2011
protostuff-json/src/test/java/io/protostuff/AbstractJsonRuntimeMapTest.java