is KtDotQualifiedExpression -> receiverExpression
    is KtThisExpression -> labelQualifier
    else -> error("Unexpected ${this::class}")
}

/**
 * N.B. We don't use [containingClassOrObject] because it works only for [KtDeclaration]s,
 * and also check only the immediate (direct) parent.
 *
 * For this function, we want to find the parent [KtClassOrObject] declaration no matter
 * how far it is from the element.
 */

     * Note that, if the calleeExpression is already a KtCallExpression, then we don't do this because such a callExpression can be properly
     * resolved to the desired FIR element. That is, cases like `getHighLevelFunction()()` just works, where the both `KtCallExpression`
     * resolve to the desired FIR element.
     */
    private fun KtElement.getContainingCallExpressionForCalleeExpression(): KtCallExpression? {