export default class ItemsValidator {
    static isValidBrackets(str: string): boolean;
    static isValidExpToParse(text: string): boolean;
    static getInvalidMessage(text: string): "Formatga mos matn kiritirsh zarur" | "Chiziqcha(-) belgisi bo'lishi shart" | "Chiziqcha(-)ni o'ng tomonida raqam bo'lishi shart" | undefined;
}