576d8d1c10
- This is in line with the API of `FirSymbolNamesProvider`. It only makes sense to compute package sets for source and library modules. Also, source module package set computation in the IDE is currently broken, so it's good to be able to return `null` in the meantime. - This also allows the removal of the workaround for source modules in `LLFirProviderHelper`, as the IDE declaration provider can now return `null` itself in this case. ^KTIJ-27411