<T> void writeObjectEncodedAsGroup(final int fieldNumber, final T value, final Schema<T> schema,
            boolean repeated) throws IOException
    {
        writeTag(fieldNumber, WireFormat.WIRETYPE_START_GROUP);
        schema.writeTo(this, value);
        writeTag(fieldNumber, WireFormat.WIRETYPE_END_GROUP);
    }
Write the nested message encoded as group.
protostuff-core/src/test/java/io/protostuff/CodedOutput.java