/**
 *
 * @param collection
 * @param predicate
 */
export declare function findKey(collection: any, predicate: any): any;
/**
 *
 * @param collection
 * @param iterate
 */
export declare function sortBy(collection: any, iterate?: any): any;
/**
 *
 * @param collection
 * @param predicate
 * @param fromIndex
 */
export declare function find(collection: any, predicate?: any, fromIndex?: any): any;
/**
 *
 * @param collection
 * @param iterate
 */
export declare function forEach(collection: any, iterate?: any): any;
/**
 *
 * @param collection
 * @param iterate
 */
export declare function map(collection: any, iterate?: any): any;
/**
 *
 * @param collection
 * @param iterate
 */
export declare function keyBy(collection: any, iterate?: any): any;
/**
 *
 * @param collection
 * @param predicate
 * @returns {any}
 */
export declare function reject(collection: any, predicate?: any): any;
/**
 *
 * @param collection
 * @param iterate
 */
export declare function groupBy(collection: any, iterate?: any): any;
/**
 *
 * @param collection
 * @param predicate
 * @returns {any}
 */
export declare function filter(collection: any, predicate?: any): any;
/**
 * Return the size of a collection
 * @param collection
 */
export declare function size(collection: any): number;
/**
 *
 * @param source
 * @param object
 * @returns {boolean}
 */
export declare function rawDiff(source: any, object: any): boolean;