code: public static void fillRuntime(final Map<String, Object> dataModel) {
          dataModel.put(Runtime.RUNTIME_CACHE, Latkes.getRuntimeCache().name());
          dataModel.put(Runtime.RUNTIME_DATABASE, Latkes.getRuntimeDatabase().name());
          dataModel.put(Runtime.RUNTIME_MODE, Latkes.getRuntimeMode().name());
      }
docs: Fills the runtime info into the specified data model.
  <ul>
  <li>{@value org.b3log.latke.Keys.Runtime#RUNTIME_CACHE}</li>
  <li>{@value org.b3log.latke.Keys.Runtime#RUNTIME_DATABASE}</li>
  <li>{@value org.b3log.latke.Keys.Runtime#RUNTIME_MODE}</li>
  </ul>
  
  @param dataModel the specified data model