public abstract fun getSamConstructor(symbol: KaClassLikeSymbol): KaSamConstructorSymbol?
}

public typealias KtSamResolver = KaSamResolver

public interface KaSamResolverMixIn : KaSessionMixIn {
    /**
     * Returns [KaSamConstructorSymbol] if the given [KaClassLikeSymbol] is a functional interface type, a.k.a. SAM.
     */
    public fun KaClassLikeSymbol.getSamConstructor(): KaSamConstructorSymbol? =

import org.jetbrains.kotlin.fir.resolve.FirSamResolver

internal class KaFirSamResolver(override val analysisSession: KaFirSession) : KaSamResolver(), KaFirSessionComponent {
    override fun getSamConstructor(symbol: KaClassLikeSymbol): KaSamConstructorSymbol? {
        val classId = symbol.classId ?: return null
        val owner = analysisSession.getClassLikeSymbol(classId) ?: return null

        val classSymbol = analysisSession.firSymbolBuilder.classifierBuilder.buildClassLikeSymbol(owner.symbol)
        with(analysisSession) {
            return classSymbol.getSamConstructor()
        }
    }

    override fun pointsToTheSameSymbolAs(other: KaSymbolPointer<KaSymbol>): Boolean = this === other ||
            other is KaFirSamConstructorSymbolPointer &&

import org.jetbrains.kotlin.resolve.sam.getSingleAbstractMethodOrNull

internal class KaFe10SamResolver(override val analysisSession: KaFe10Session) : KaSamResolver(), KaFe10SessionComponent {
    override fun getSamConstructor(symbol: KaClassLikeSymbol): KaSamConstructorSymbol? {
        val descriptor = (getSymbolDescriptor(symbol) as? ClassifierDescriptorWithTypeParameters)?.denotedClassDescriptor

                ?: getTypeAliasByClassId(classId)
                ?: error("Class-like symbol is not found by '$classId'")

            val samConstructor = symbol.getSamConstructor() ?: error("SAM constructor is not found for symbol '$symbol'")
            return listOf(samConstructor)
        }
    }

    companion object {
        val identifiers = arrayOf(
            "package:",

        return AvailableSymbol(classifierSymbol, ImportKind.fromScope(scope))
    }

    private fun FirClassLikeSymbol<*>.getSamConstructor(): FirNamedFunctionSymbol? {
        val samResolver = FirSamResolver(firSession, analysisSession.getScopeSessionFor(firSession))

        return samResolver.getSamConstructor(fir)?.symbol
    }

    /**