) : KtScope {
    final override val token: KtLifetimeToken get() = builder.token

    override fun getCallableSymbols(nameFilter: KtScopeNameFilter): Sequence<KtCallableSymbol> = withValidityAssertion {
        firScope.getCallableSymbols(getPossibleCallableNames().filter(nameFilter), builder)
    }

    override fun getCallableSymbols(names: Collection<Name>): Sequence<KtCallableSymbol> = withValidityAssertion {