/**
 * Clones deeply all of the sources objects values into the target, except the arrays,
 * which only generates a new one, but keeping the references of the sources one.
 *
 * TODO Make it work with circular references.
 *
 * @param target - The object which will be used as the base to clone all the sources into.
 * @param sources - One or more objects to clone to the target.
 *
 * @returns The target modified.
 */
export declare function deepMerge(target: any, ...sources: any[]): any;
/**
 * When setting replace behaviour to an object, target properties will not be used,
 * only the source ones.
 *
 * @param obj - The object to set its merge behavior.
 * @example
 * ```ts
 * const target = { children: { a: 1, b: 2, c: 3 } };
 * const firstSource = { children: replaceBehaviour({ c: 4, d: 5 }) };
 * deepMerge(target, firstSource);
 * // `target` is now { children: { c: 4, d: 5 } }
 * ```
 *
 * @returns The same object with the new behaviour.
 */
export declare function replaceBehaviour<T extends Record<string, unknown>>(obj: T): T;
/**
 * When setting deep merge behaviour, target and source properties will be used. This is the default
 * behavior.
 *
 * @param obj - The object to set its merge behavior.
 *
 * @returns The same object with the new behaviour.
 */
export declare function deepMergeBehaviour<T extends Record<string, unknown>>(obj: T): T;