register(declaration, consumer::declareClassIfNotExists)
        super.visitClass(declaration)
    }

    override fun visitTypeAlias(declaration: IrTypeAlias) {
        register(declaration, consumer::declareTypeAliasIfNotExists)
        super.visitTypeAlias(declaration)
    }

    override fun visitScript(declaration: IrScript) {
        register(declaration, consumer::declareScript)

    // with its `LLFirSession`.
    private val cache: ConcurrentMap<KtModule, KtAnalysisSession> = ContainerUtil.createConcurrentSoftValueMap()

    init {
        LowMemoryWatcher.register(::clearCaches, project)
    }

    override fun getAnalysisSession(useSiteKtElement: KtElement): KtAnalysisSession {
        val module = ProjectStructureProvider.getModule(project, useSiteKtElement, contextualModule = null)