inMemory

Setting this will create an in-memory Realm instead of saving it to disk. In-memory Realms might still use disk space if memory is running low, but all files created by an in-memory Realm will be deleted when the Realm is closed.

Note that because in-memory Realms are not persisted, you must be sure to hold on to at least one non-closed reference to the in-memory Realm instance as long as you want the data to last.