code: @Override
      public boolean clearKnowledgeBase() {
  
          if (!this.graphStoreManager.canBeModified()) {
              log.warn("The dataset cannot be modified.");
              return false;
          }
  
          log.info("Clearing knowledge base.");
          this.graphStoreManager.clearDataset();
  
          // Generate Event
          this.getEventBus().post(new KnowledgeBaseClearedEvent(new Date()));
  
          return true;
      }
docs: Deletes all the ontologies from a Knowledge Base.
  This operation cannot be undone. Use with care.
  
  @return