private function lookUpAutomaticFields(ApiInterface $entity, $isCreating) {
        if($isCreating) {
            $automaticAttributes = $entity->getModelsMetaData()->getAutomaticCreateAttributes($entity);
        } else {
            $automaticAttributes = $entity->getModelsMetaData()->getAutomaticUpdateAttributes($entity);
        }
        $columnMap = $entity->getModelsMetaData()->getColumnMap($entity);
        $automaticFields = array_fill_keys($entity->getAutomaticallyUpdatedFields(), null);
        foreach($automaticAttributes as $fullName => $null) {
            $automaticFields[$columnMap[$fullName]] = null;
        }
        return $automaticFields;
    }