/**
 * Check if str only contians upper case letters
 */
export declare function isUpperCase(str: string): boolean;
export declare function uniqueId(prefix?: string): string;
/**
 * Truncate text with option to keep a number of characters on end.  Inserts ellipsis between parts
 */
export declare function truncate(text: string, totalChars: number, endChars?: number): string;