/**
 * Truncates a string value to the specified length with an ellipsis.
 * @param {string} value - The value to truncate.
 * @param {number} maxLength - The maximum length of the value.
 * @return {string} A truncated string with ellipsis if the value's length is greater than the max length.
 */
export declare function truncate(value: string, maxLength: number): string;
/**
 * Converts a string value to a number value.
 * @param {string} value - The string value to convert.
 * @return {number} The converted value as a number.
 */
export declare function toNumber(value: string): number;
/**
 * Converts a string value to a boolean value.
 * @param {string} value - The string value to convert.
 * @return {boolean} The converted value as a boolean.
 */
export declare function toBoolean(value: string): boolean;
/**
 * Reverses a string value.
 * @param {string} value - The string value to reverse.
 * @return {string} The reversed string value.
 */
export declare function reverseString(value: string): string;