private
    val elementErrors = IdentityHashMap<LanguageTreeElement, MutableList<ResolutionError>>()

    override fun assignmentResolution(assignment: Assignment): ResolutionTrace.ResolutionOrErrors<AssignmentRecord> =
        assignmentResolutions[assignment]?.let { resolution ->
            check(assignment !in elementErrors)
            Resolution(resolution)
        } ?: elementErrors[assignment]?.let { errors ->

        if (!errors.isEmpty()) {
            Messager messager = processingEnv.getMessager();
            errors.forEach((element, elementErrors) -> elementErrors.forEach(error -> messager.printMessage(Diagnostic.Kind.ERROR, error.reason, element)));
            return;
        }

        List<CallInterceptionRequest> requests = postProcessRequests(successResults);