*
     * N.B. This function only searches for extension callables qualified by receiver types!
     * It does not try to resolve fully qualified or member functions, because they are dealt
     * with by the other parts of [KDocReferenceResolver].
     */
    private fun KtAnalysisSession.getTypeQualifiedExtensions(fqName: FqName, contextElement: KtElement): Collection<ResolveResult> {
        if (fqName.isRoot) return emptyList()