@OptIn(KtAnalysisApiInternals::class)
    override val classKind: KtClassKind
        get() = withValidityAssertion {
            if (DescriptorUtils.isAnonymousObject(descriptor)) {
                error("Should be an anonymous object")
            }
            descriptor.kind.toKtClassKind(isCompanionObject = descriptor.isCompanionObject)
        }

    override val superTypes: List<KtType>
        get() = withValidityAssertion {

                is KtObjectDeclaration -> when {
                    psi.isCompanion() -> KtClassKind.COMPANION_OBJECT
                    psi.isObjectLiteral() -> KtClassKind.ANONYMOUS_OBJECT
                    else -> KtClassKind.OBJECT
                }
                is KtClass -> when {
                    psi.isInterface() -> KtClassKind.INTERFACE

        typeMapper.mapType(type, mode, signatureWriter)

        val canonicalSignature = signatureWriter.toString()
        require(!canonicalSignature.contains(SpecialNames.ANONYMOUS_STRING))

        if (canonicalSignature.contains("L<error>")) return null
        if (canonicalSignature.contains(SpecialNames.NO_NAME_PROVIDED.asString())) return null