import { FormControl } from '@angular/forms';
/**
 * @dynamic need this because there are static memebers
 */
export declare class UserNameValidator {
    /**
     * Username regular expression pattern
     *
     * letters and numbers only
     */
    static readonly UsernamePattern: string;
    /**
     * Username regular expression pattern
     *
     * letters and numbers
     *
     * Doesn't allow underscore or . at the beginning or end of value
     */
    static readonly UsernameNoUnderscoreDotPattern: RegExp;
    static ValidUsername(control: FormControl): {
        [key: string]: any;
    };
}