public function withTitleAndDescription(string $title, ?string $description = null): self 	{ 		$title_array = [ 			'en' => $title, 			'hr' => $title, 		];  		$description_array = [ 			'en' => $description, 			'hr' => $description, 		];  		return $this->state([ 			'title' => $title_array, 			'description' => $description_array, 		]); 	}