Let's say that I create a Data type named "SimpleObjectStorage".
I can then use SparkGameDataService to create an item in it, named "SimpleObjectStorage_Test".
This name is technically invalid (in that it includes an underscore) but the API does not throw any error.
However, if I try to query for the item in the UI, I get an error:
Also, if I try to look up such an instance via Cloud Code, I get a nonsensical error: "java.lang.ClassCastException: com.gamesparks.scripting.data.impl.SparkDataResultImpl cannot be cast to com.gamesparks.scripting.data.SparkDataGetResult"