/**
 *
 * @param inputValue - value to check if it is a string
 * @returns {boolean} - true if value is a string
 */
export declare const isString: (inputValue: string | number | ReadonlyArray<string> | undefined) => inputValue is string;
/**
 *
 * @param inputValue - value to check if it is a number
 * @returns {boolean} - true if value is a number
 */
export declare const isNumber: (inputValue: string | number | undefined) => inputValue is number;