return providers.flatMapTo(mutableListOf()) { it.findFilesForFacadeByPackage(packageFqName) }
    }

    override fun findFilesForFacade(facadeFqName: FqName): Collection<KtFile> {
        return providers.flatMapTo(mutableListOf()) { it.findFilesForFacade(facadeFqName) }
    }

    override fun findInternalFilesForFacade(facadeFqName: FqName): Collection<KtFile> {

    override fun getTopLevelCallableNamesInPackage(packageFqName: FqName): Set<Name> = emptySet()
    override fun findFilesForFacadeByPackage(packageFqName: FqName): List<KtFile> = emptyList()
    override fun findFilesForFacade(facadeFqName: FqName): List<KtFile> = emptyList()
    override fun findInternalFilesForFacade(facadeFqName: FqName): List<KtFile> = emptyList()
    override fun findFilesForScript(scriptFqName: FqName): List<KtScript> = emptyList()

    public abstract fun getTopLevelCallableNamesInPackage(packageFqName: FqName): Set<Name>

    public abstract fun findFilesForFacadeByPackage(packageFqName: FqName): Collection<KtFile>

    public abstract fun findFilesForFacade(facadeFqName: FqName): Collection<KtFile>

    /**
     * Currently we want only classes from libraries ([org.jetbrains.kotlin.analysis.decompiler.psi.file.KtClsFile])
     */

        if (kotlinFile.packageFqName != packageFqName) {
            return emptyList()
        }

        return listOf(kotlinFile)
    }

    override fun findFilesForFacade(facadeFqName: FqName): Collection<KtFile> {
        if (kotlinFile.javaFileFacadeFqName != facadeFqName) return emptyList()

        for (declaration in topLevelDeclarations) {

    }

    override fun findFilesForFacadeByPackage(packageFqName: FqName): Collection<KtFile> {
        return index.facadeFileMap[packageFqName].orEmpty().filter { it.virtualFile in scope }
    }

    override fun findFilesForFacade(facadeFqName: FqName): Collection<KtFile> {
        if (facadeFqName.shortNameOrSpecial().isSpecial) return emptyList()