protected function prepareForValidation(): void 	{ 		$this->merge([ 			'slug_en' => Category::generateSlug($this->slug_en, 'en'), 			'slug_hr' => Category::generateSlug($this->slug_hr, 'hr'), 			'slug_de' => Category::generateSlug($this->slug_de, 'de'), 			'slug_sl' => Category::generateSlug($this->slug_sl, 'sl'), 			'slug_sr' => Category::generateSlug($this->slug_sr, 'sr'), 		]); 	}