Spatie\MediaLibrary\Conversion\ConversionCollection::addConversionsFromRelatedModel PHP Method

    protected function addConversionsFromRelatedModel(Media $media)
    {
        $modelName = Arr::get(Relation::morphMap(), $media->model_type, $media->model_type);
        /*
         * To prevent an sql query create a new model instead
         * of the using the associated one
         */
        $model = new $modelName();
        if ($model instanceof HasMediaConversions) {
            $model->registerMediaConversions();
        }
        $this->items = $model->mediaConversions;
    }