private fun KtExpression.getPossiblyQualifiedSimpleNameExpression(): KtSimpleNameExpression? {
    return ((this as? KtQualifiedExpression)?.selectorExpression ?: this) as? KtSimpleNameExpression?
}

/**
 * Helper abstraction to navigate through qualified FIR elements - we have to match [ClassId] and PSI qualifier pair
 * to correctly reason about long qualifiers.
 */
private sealed interface TypeQualifier {

            // The class with name `classId.shortClassName` happens to be the same class referenced by this qualified access.
            availableClassifier.symbol.classIdIfExists == qualifierClassId -> {
                // Respect caller's request to use star import, if it's not already star-imported.
                return when {
                    availableClassifier.importKind == ImportKind.EXPLICIT && importAllInParent -> {

After cloning the project, import the project in IntelliJ by choosing the project directory in the Open project dialog.

For handy work with compiler tests it's recommended to use [
Kotlin Compiler Test Helper](https://github.com/demiurg906/test-data-helper-plugin)

### Dependency verification

We have a [dependencies verification](https://docs.gradle.org/current/userguide/dependency_verification.html) feature enabled in the

            // the `invoke` member function. In this case, we use the `calleeExpression` in the `KtCallExpression` as the PSI
            // representation of this receiver. Caller can then use this PSI for further call resolution, which is implemented by the
            // parameter `resolveCalleeExpressionOfFunctionCall` in `toKtCallInfo`.
            var explicitReceiverPsi = when (psi) {