protected function setReferenceSource()
    {
        if (null !== $this->info->reference->source) {
            return $this;
        }

        // No source is set, see if we can find a standard match
        $matchAttributes = config('cms-models.analyzer.reference.sources', []);
        
        foreach ($matchAttributes as $matchAttribute) {

            if (array_key_exists($matchAttribute, $this->info->attributes)) {
                $this->info->reference->source = $matchAttribute;
                break;
            }
        }

        return $this;
    }