code: @SuppressWarnings("unchecked")
    public <T> T get(String key, Class<T> clazz) {
      return (T) datas.get(key);
    }
docs: <p>
  get.
  </p>
  
  @param key a {@link java.lang.String} object.
  @param clazz a {@link java.lang.Class} object.
  @param <T> a T object.
  @return a T object.