ImportSourceClient -> ImportClient
ImportSource -> ServerImporter
ImportSourceConfig -> ServerImporterConfig
ImportSourceDialog -> ServerImportDialog
AmazonClient -> AmazonImporter
DiscogsClient -> DiscogsImporter
FreedbClient -> FreedbImporter
MusicBrainzReleaseClient -> MusicBrainzReleaseImporter
TrackTypeClient -> TrackTypeImporter