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

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