instanceSaver

ScriptingProtocol puts references to pre-tokenized returned objects in here. Should be cleared here at the end of each REPL execution.

This makes sure a single script execution doesn't get its tokenized Kotlin/JVM objects garbage collected, and has a chance to save them elsewhere (E.G. ScriptingScope.apiHelpers.registeredInstances) if it needs them later. Should preserve each instance, not just each value, so should be List and not Set. To test in Python console backend: x = apiHelpers.Jvm.Vector2(1,2); civInfo.endTurn(); print(apiHelpers.toString(x))