if (descriptor.functionTypeKind.isReflectType) false
            else fe10Type.getReceiverTypeFromFunctionType() != null
        }

    override val receiverType: KtType?
        get() = withValidityAssertion {
            if (descriptor.functionTypeKind.isReflectType) null
            else fe10Type.getReceiverTypeFromFunctionType()?.toKtType(analysisContext)
        }

    override val parameterTypes: List<KtType>