docs: public void setFeedback(final SpecTopic feedback) {
          if (feedback == null && this.feedback == null) {
              return;
          } else if (feedback == null) {
              removeChild(this.feedback);
              this.feedback = null;
          } else if (this.feedback == null) {
              feedback.setTopicType(TopicType.FEEDBACK);
              this.feedback = new KeyValueNode<SpecTopic>(CommonConstants.CS_FEEDBACK_TITLE, feedback);
              appendChild(this.feedback, false);
          } else {
              feedback.setTopicType(TopicType.FEEDBACK);
              this.feedback.setValue(feedback);
          }
      }