*
     * To properly resolve qualifier parts in the middle,
     * we need to resolve the whole qualifier to understand which parts of the qualifier are package or class qualifiers.
     * And then we will be able to resolve the qualifier selected by the user to the proper class, package or callable.
     *
     * It's possible that the whole qualifier is invalid, in this case we still want to resolve our [selectedFqName].

            .toList()
            .asReversed()

        val qualifyingReferences = qualifiers.mapIndexed { index, qualifier ->
            // We want to handle qualified calls like `foo.Bar.Baz()`, but not like `foo.Bar().Baz()`
            if (qualifier is KtCallExpression && index != qualifiers.lastIndex) return null

            qualifier.referenceExpression() as? KtNameReferenceExpression ?: return null
        }

     * when we shorten [qualifier].
     */
    private fun removeRedundantElements(qualifier: KtElement) {
        typesToShorten.removeAll { it.element.qualifier?.isInsideOf(qualifier) == true }
        qualifiersToShorten.removeAll { it.element.receiverExpression.isInsideOf(qualifier) }
    }

            }
        }
    }

    /**
     * Returns a [FirExpression] matching the given PSI [receiverExpression].
     *
     * @param receiverExpression a qualified expression receiver (e.g., `foo` in `foo?.bar()`, or in `foo.bar`).
     *
     * The function unwraps certain receiver expressions. For instance, for safe calls direct counterpart to a [KtSafeQualifiedExpression]

        qualifier: KtElement,
    ) : TypeQualifier {

        private val dotQualifier: KtDotQualifiedExpression? = qualifier as? KtDotQualifiedExpression

        private val typeNameReference: KtNameReferenceExpression = run {
            require(qualifier is KtNameReferenceExpression || qualifier is KtDotQualifiedExpression || qualifier is KtCallExpression) {

            // Unary expressions always use its operand.
            is KtUnaryExpression ->
                parent.baseExpression == child

            // Qualified expressions always use its receiver. The selector is
            // used iff the qualified expression is.
            is KtQualifiedExpression ->
                parent.receiverExpression == child || (parent.selectorExpression == child && isUsed(parent))

        if (reference !is KtSimpleNameReference) {
            return false
        }
        val referenceElement = reference.element
        val qualifier = referenceElement.getOrBuildFirSafe<FirResolvedQualifier>(analysisSession.firResolveSession) ?: return false
        return qualifier.resolvedToCompanionObject
    }

- [`KTIJ-26103`](https://youtrack.jetbrains.com/issue/KTIJ-26103) K2 IDE: False positive in redundant qualifier inspection
- [`KTIJ-26024`](https://youtrack.jetbrains.com/issue/KTIJ-26024) K2 IDE: False positive "Redundant qualifier" inspection on a nested class which extends its outer class

        ) return null
        return unaryExpression
    }

    /**
     * When resolving selector expression of a [KtDotQualifiedExpression], we instead resolve the containing qualified expression. This way
     * the corresponding FIR element is the `FirFunctionCall` or `FirPropertyAccessExpression`, etc.
     */

        )
    }
    add(FirErrors.TYPEALIAS_AS_CALLABLE_QUALIFIER_IN_IMPORT.errorFactory) { firDiagnostic ->
        TypealiasAsCallableQualifierInImportErrorImpl(
            firDiagnostic.a,
            firDiagnostic.b,
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.TYPEALIAS_AS_CALLABLE_QUALIFIER_IN_IMPORT.warningFactory) { firDiagnostic ->