XF 2.2 Best way to deal with Fatal error: Cannot declare class

[CStrategies]

Occasionally I will make a mistake adding a class extension and end up with the dreaded Fatal error: Cannot declare class

Usually, I can find the mistake in the class file and correct it. But not today.

So, I thought a clever way to deal with this would be to remove the entry from the xf_class_extension table. That did not work, and I'd like to understand why so I can find a better way to deal with this issue in the future.