/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
/**
 * Helper class containing string utility methods.
 */
export declare class StringUtils {
    /**
       * Truncate string with ...
       *
       * @param text Text.
       * @param length Length to truncate text.
       * @returns Original string modified.
       */
    static ellipsis(text: string, length: number): string;
    /**
       * UniqueHash - create a unique hash from a string.
       *
       * @param text Text to hash.
       * @returns A string which is an unique hash.
       *
       * @remarks
       * The source for this function was derived from the following article:
       * https://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
       *
       */
    static hash(text: string): string;
    /**
       * EllipsisHash - create truncated string with unique hash for the truncated part.
       *
       * @param text Text to truncate.
       * @param length Length to truncate at.
       * @returns The truncated string with unique hash for the truncated part.
       */
    static ellipsisHash(text: string, length: number): string;
}