require(tools.isNotEmpty())
    }

    override val token: KtLifetimeToken get() = analysisSession.token

    override fun getCallableSymbols(nameFilter: KtScopeNameFilter): Sequence<KtCallableSymbol> = withValidityAssertion {
        getTopLevelDeclarations(nameFilter) { it.getTopLevelCallables() }
    }

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