BufferUnpacker unpacker = msgpack.createBufferUnpacker(bytes);
if (unpacker.trySkipNil()) {
assertEquals(null, v);
return;
}
int size = unpacker.readMapBegin();
Map<K, V> ret = new HashMap<K, V>(size);
for (int i = 0; i < size; ++i) {
Value keyValue = unpacker.readValue();
K key = new Converter(keyValue).read(keyElementClass);
Value valueValue = unpacker.readValue();