docs: private void addDependency(DynamicProperty dynamic, String placeholder) {
          List<DynamicProperty> l = placeholderToDynamics.get(placeholder);
          if (l == null) {
              l = new ArrayList<DynamicProperty>();
              placeholderToDynamics.put(placeholder, l);
          }
          if (!l.contains(dynamic)) {
              l.add(dynamic);
          }
          dynamic.addPlaceholder(placeholder);
      }