in jackson2/src/java/org/apache/fulcrum/json/jackson/Jackson2MapperService.java [366:374]
public ObjectMapper setMixins(Class target, Class mixin) {
Map<Class<?>, Class<?>> sourceMixins = null;
if (target != null) {
sourceMixins = new HashMap<>(1);
sourceMixins.put(target, mixin);
}
getLogger().debug("complete reset mixins for target " + target + ", mixin: " + mixin);
return mapper.setMixIns(sourceMixins);
}