Minor: some null TODOs fixed
Minor: some null TODOs fixed
Introduce packageExists utility in PackageIndexUtil
Use PackageIndexUtil#packageExists in IDELightClassGenerationSupport
Introduce packageExists utility in PluginDeclarationProviderFactory
FIXUP: remove unoptimal code in JetSourceFilterScope
++ Use PackageIndexUtil#packageExists in IDELightClassGenerationSupport
++ fix nulls
Improve SyntheticFilesFilteringScope performance
COMMENT: JetSourceFilterScope performance