public static <T extends Serializable> StorageKey<T> serializableKey(String keyName){
      return new StorageKey<>(keyName, Serializable.class);
  }
public static <T extends Serializable> StorageKey<T> serializableKey(String keyName){
      return new StorageKey<>(keyName, Serializable.class);
  }
public static < T extends Serializable > StorageKey < T > serializableKey ( String keyName ) { return new StorageKey <> ( keyName , Serializable . class ) ; }
Returns Serializable type value's storage key.

@param keyName name of storage key
@param <T> type of value
@return Serializable type value's storage key
Returns Serializable type value s storage key .