def METHOD_NAME(col: Collection) -> list[str]:
    from anki.importing import AnkiPackageImporter
    from anki.importing import MnemosyneImporter as LegacyMnemosyneImporter
    from anki.importing import TextImporter, importers
    return [
        ext
        for (text, importer) in importers(col)
        if importer not in (TextImporter, AnkiPackageImporter, LegacyMnemosyneImporter)
        for ext in re.findall(r"[( ]?\*(\..+?)[) ]", text)
    ]