import { ValidatorFn } from "@angular/forms";
export declare class UserRules {
    /**
     * @Sample 案例：
     * ```
     * UserRules.sample('hello', '请输入')
     * ```
     */
    static sample(str: string, errorMsg?: string): ValidatorFn;
}
export declare function updateRule(ctrl: any, rules: any): void;
export declare function updateRequired(conf: any, prop: any, required: any): void;