Adjusting Custom Model's Hyperparameter's is allowed, but not functional.

[macksjeremy]

The codebase allows for custom models to have hyperparameters input programmatically, when that doesn't work. I'm sure this is intentional, but there's no documentation on the issue. There should be some sort of warning/exception for adjusting hyperparameters programmatically of a custom model, as a user may waste time on ineffective hyperparameter tuning.