protected function registerMediaCollections(array $pairs = []): self 	{ 		foreach ($pairs as $options) { 			$collection = $this->model->addMediaCollection($options['collection'])->useDisk($options['disk'])->storeConversionsOnDisk($options['conversions_disk']);  			if ($options['max']) { 				$collection->onlyKeepLatest($options['max']); 			} 		}  		return $this; 	}