public function getByIdOrSlug(string $blog, ?string $lang): self 	{ 		$blog = self::includes($lang)->available()->where(function ($query) use ($blog) { 			$query->where('id', $blog) 				->orWhere('slug', $blog) 				->orWhereHas('translations', function ($query) use ($blog) { 					$query->where([ 						['column', 'slug'], 						['value', $blog], 					]); 				}); 		})->firstOrFail();  		return $blog; 	}