/**
 * Clones (copies) an Object using deep copying.
 *
 * This function supports circular references by default, but if you are certain
 * there are no circular references in your object, you can save some CPU time
 * by calling clone(obj, false).
 *
 * Caution: if `circular` is false and `parent` contains circular references,
 * your program may enter an infinite loop and crash.
 *
 * @param `parent` - the object to be cloned
 * @param `circular` - set to true if the object to be cloned may contain
 *    circular references. (optional - true by default)
 * @param `depth` - set to a number if the object is only to be cloned to
 *    a particular depth. (optional - defaults to Infinity)
 * @param `prototype` - sets the prototype to be used when cloning an object.
 *    (optional - defaults to parent prototype).
 * @param `includeNonEnumerable` - set to true if the non-enumerable properties
 *    should be cloned as well. Non-enumerable properties on the prototype
 *    chain will be ignored. (optional - false by default)
*/
declare function clone(parent: any, circular?: any, depth?: number, prototype?: any, includeNonEnumerable?: boolean): any;
declare namespace clone {
    var clonePrototype: (parent: any) => any;
    var __objToStr: (o: any) => string;
    var __isDate: (o: any) => boolean;
    var __isArray: (o: any) => boolean;
    var __isRegExp: (o: any) => boolean;
    var __getRegExpFlags: (re: any) => string;
}
export default clone;