code: public boolean isSpecTopicInLevelByTopicID(final Integer topicId) {
          final SpecTopic foundTopic = getClosestTopicByDBId(topicId, false);
          return foundTopic != null;
      }
docs: Checks to see if a SpecTopic exists within this level or its children.
  
  @param topicId The ID of the topic to see if it exists.
  @return True if the topic exists within this level or its children otherwise false.