/**
 * Loosely validate a URL `string`.
 *
 * @param {String} string
 * @return {Boolean}
 */
export declare function isUrl(string: string): boolean;
/**
 *
 * @param {Any} data
 * @return {Boolean}
 */
export declare function isString(data: any): boolean;
/**
 *
 * @param {Any} data
 * @return {Boolean}
 */
export declare function isObject(data: any): boolean;
/**
 *
 * @param {Any} data
 * @return {Boolean}
 */
export declare function isNumber(data: any): boolean;
/**
 *
 * @param {Any} data
 * @return {Boolean}
 */
export declare function isBoolean(data: any): boolean;
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