override val descriptor: FunctionDescriptor? by cached {
        val bindingContext = analysisContext.analyze(psi, AnalysisMode.PARTIAL)
        bindingContext[BindingContext.FUNCTION, psi]
    }

    override val valueParameters: List<KtValueParameterSymbol>
        get() = withValidityAssertion { psi.valueParameters.map { KtFe10PsiValueParameterSymbol(it, analysisContext) } }