if (elem == null) {
provider.defaultSerializeNull(jgen);
continue;
}
Class<?> cc = elem.getClass();
JsonSerializer<Object> serializer = serializers.serializerFor(cc);
if (serializer == null) {
serializer = _findAndAddDynamic(serializers, cc, provider);
}
serializer.serializeWithType(elem, jgen, provider, typeSer);
}