`CifIntFuncUtils` is confusingly named, as it sounds like it is about utilities for working with CIF functions that return integer values or so. The `Int` part actually refers to 'internal' user-defined functions. I think `CifInternalFuncUtils` or even `CifInternalFunctionUtils` would be more clear. I think short names are a remnant from those times we had an 80 character line limit. If we rename this, we should also rename the `OrderIntFunctions` and `CollectIntFunctionsUsage` inner classes. And maybe also rename `CifExtFuncUtils` then.