protected abstract ImmutableMap.Builder<Object, Object> createBuilder();
@Override
protected T _deserializeEntries(JsonParser jp, DeserializationContext ctxt) throws IOException,
JsonProcessingException {
final KeyDeserializer keyDes = _keyDeserializer;
final JsonDeserializer<?> valueDes = _valueDeserializer;
final TypeDeserializer typeDeser = _typeDeserializerForValue;
ImmutableMap.Builder<Object, Object> builder = createBuilder();
for (; jp.getCurrentToken() == JsonToken.FIELD_NAME; jp.nextToken()) {
// Must point to field name now
String fieldName = jp.getCurrentName();
Object key = (keyDes == null) ? fieldName : keyDes.deserializeKey(fieldName, ctxt);
// And then the value...
JsonToken t = jp.nextToken();
// 28-Nov-2010, tatu: Should probably support "ignorable properties" in future...
Object value;
if (t == JsonToken.VALUE_NULL) {