public function rules(): array 	{ 		return [ 			'min_date' => ['required', 'date'], 			'max_date' => ['required', 'date', 'after:min_date'], 			'date_format' => ['required', 'string', Rule::in(['Y', 'Y-m', 'Y-m-d', 'Y-m-d H'])], 		]; 	}