* [CallableDescriptor.getOverriddenDescriptors] instead, which is separate from [CallableDescriptor.getOriginal].
 */
@Suppress("UNCHECKED_CAST")
private fun <T : CallableDescriptor> T.unwrapUseSiteSubstitutionOverride(): T {
    var current: CallableDescriptor = this
    while (original != current) {
        current = current.original
    }

        }

        return when (fir) {
            is FirAnnotationCall -> {
                if (unsubstitutedKtSignature.symbol !is KtConstructorSymbol) return null
                @Suppress("UNCHECKED_CAST") // safe because of the above check on targetKtSymbol
                KtAnnotationCall(
                    partiallyAppliedSymbol as KtPartiallyAppliedFunctionSymbol<KtConstructorSymbol>,

                require(diagnostic is DiagnosticWithParameters1<*, *>)
                @Suppress("UNCHECKED_CAST")
                diagnostic.a as Collection<ResolvedCall<*>>
            }
            in diagnosticWithResolvedCallsAtPosition2 -> {
                require(diagnostic is DiagnosticWithParameters2<*, *, *>)
                @Suppress("UNCHECKED_CAST")
                diagnostic.b as Collection<ResolvedCall<*>>
            }

        )
    }
    add(FirErrors.USELESS_CAST) { firDiagnostic ->
        UselessCastImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.UNCHECKED_CAST) { firDiagnostic ->
        UncheckedCastImpl(
            firSymbolBuilder.typeBuilder.buildKtType(firDiagnostic.a),
            firSymbolBuilder.typeBuilder.buildKtType(firDiagnostic.b),

            else -> null
        }
    }

    private fun <T> ConstantValueKind<T>.toLiteralExpression(source: KtSourceElement?, value: Any?): FirLiteralExpression<T> =
        @Suppress("UNCHECKED_CAST")
        buildLiteralExpression(source, this, value as T, setType = false)

    private fun FirFunctionCall.getOriginalFunction(): FirCallableDeclaration? {

- [`KT-59764`](https://youtrack.jetbrains.com/issue/KT-59764) Make a frontend checker that reports cast to forward declaration as unchecked
- [`KT-60528`](https://youtrack.jetbrains.com/issue/KT-60528) Updates for JVM/IR backend of kotlin-atomicfu-compiler-plugin