Data Validator

Data Validator is a feature introduced in 2.0.5, which ensures that Tutorials play with no runtime errors. No setup is required to make it work!

Before Tutorial is played, its fields (including fields of the stages) are checked whether they're valid. If at least one field is not valid, it will print out which field of which stage of which tutorial is invalid.

The data validation check is done after OnTutorialEnter is invoked. However, OnTutorialPlay won't be invoked unless data validation checks pass.