}

    /**
     * @return a [FqName] which can be used to import [this] symbol or `null` if the symbol cannot be imported.
     */
    public fun KaSymbol.getImportableName(): FqName? = withValidityAssertion {
        return analysisSession.importOptimizer.getImportableName(this)
    }
}

public typealias KtImportOptimizerMixIn = KaImportOptimizerMixIn

public class KaImportOptimizerResult(

    override fun analyseImports(file: KtFile): KaImportOptimizerResult = withValidityAssertion {
        error("FE10 implementation of KtImportOptimizer should not be called from anywhere")
    }

    override fun getImportableName(symbol: KaSymbol): FqName? {
        require(symbol is KaFe10Symbol)

        val descriptor = getSymbolDescriptor(symbol)
        if (descriptor?.canBeReferencedViaImport() != true) return null

        val (usedDeclarations, unresolvedNames) = collectReferencedEntities(file)

        return KaImportOptimizerResult(usedDeclarations, unresolvedNames)
    }

    override fun getImportableName(symbol: KaSymbol): FqName? = when (symbol) {
        is KaClassLikeSymbol -> symbol.classId?.asSingleFqName()
        is KaCallableSymbol -> symbol.firSymbol.computeImportableName(firSession)
        else -> null
    }