packer.writeMapBegin(v.size());
for (Map.Entry<K, V> e : ((Map<K, V>) v).entrySet()) {
packer.write(e.getKey());
packer.write(e.getValue());
}
packer.writeMapEnd();
}
Value r = packer.getResult();
Converter unpacker = new Converter(msgpack, r);
if (unpacker.trySkipNil()) {
assertEquals(null, v);