code: @Deprecated
    public static <T> StorageKey<T> objectKey(String keyName){
      return new StorageKey<>(keyName, Object.class);
    }
docs: Returns non-primitive type value's storage key.
  
  @param keyName name of storage key
  @param <T> type of value
  @return non-primitive type value's storage key
  @deprecated use {@link #isSerializableKey(String)} or {@link #serializableKey(String)} instead