code: public final void change() {
          final ApiAttribute chanAttr = new ApiAttribute("attribute", "Changed");
          chanAttr.getAttributes().add(new DateUtil().todayDateAttribute());
          final ArrayList<ApiAttribute> chanList = new ArrayList<>();
          chanList.add(chanAttr);
          this.changed.clear();
          this.changed.addAll(chanList);
      }
docs: Mark the person as changed today.