@Override
    protected <T> void writeTo(OutputStream out, T message, Schema<T> schema)
            throws IOException
    {
        ProtobufIOUtil.writeTo(out, message, schema, buf());
    }
Protobuf impl for {@link NullArrayElementTest}.

@author David Yu
@created Sep 29, 2014
protostuff-runtime/src/test/java/io/protostuff/runtime/ProtobufNullArrayElementTest.java