export declare class TbxStrings {
    static isNullOrEmpty(value: any): boolean;
    static isNotNullOrEmpty(value: any): value is string;
    static isNullOrWhiteSpace(value: any): value is string;
    static isNotNullOrWhiteSpace(value: any): value is string;
    static Equals(value1: any, value2: any): value1 is string;
    static NotEquals(value1: any, value2: any): value1 is string;
    static EqualsIgnoreCase(value1: any, value2: any): value1 is string;
    static NotEqualsIgnoreCase(value1: any, value2: any): boolean;
    static stripNonDigits(value: any, keepCurrency?: boolean): string;
    static isSsn(value: any): value is string;
    static isNotSsn(value: any): value is string;
    static formatSsn(value: any, addDashes?: boolean): string;
    static maskSsn(ssn: any): string;
    static trimLeft(text: string, what?: string): string;
    static trimRight(text: string, what?: string): string;
    static removeTrailingSlash(text: string): string;
    static removeLeadingSlash(text: string): string;
    static addTrailingSlash(text: string): string;
    static ensureEndsWith(text: string, what: string): string;
    static ensureStartsWith(text: string, what: string): string;
}