src/main/java/com/seanchenxi/gwt/storage/client/StorageKeyFactory.java
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