/*! Copyright [Amazon.com](http://amazon.com/), Inc. or its affiliates. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0 */
import { Obj } from "projen/lib/util";
/**
 * Utility to deeply clone a value
 * @param value Value to clone
 * @returns Cloned value
 */
export declare function cloneDeep(value: any): any;
/** Indicates if value is considered empty */
export declare function isEmpty(value: any): boolean;
/** Replace empty value with undefined */
export declare function asUndefinedIfEmpty(value: any): any | undefined;
/** Options for deep merge function */
export interface DeepMergeOptions {
    /**
     * Append array values
     * @default false
     */
    readonly append?: boolean;
    /**
     * `undefined`s will cause a value to be deleted if destructive is enabled.
     * @default false
     */
    readonly destructive?: boolean;
}
/**
 * Recursively merge objects together into a new object with extends support for appending arrays.
 *
 * This is a clone of [projen/lib/util#deepMerge](https://github.com/projen/projen/blob/55ac3657a270285db63e1a6008b3848b36775626/src/util.ts#L218-L281)
 * with added functionality to support appending arrays.
 *
 * @see [projen/lib/util#deepMerge](https://github.com/projen/projen/blob/55ac3657a270285db63e1a6008b3848b36775626/src/util.ts#L218-L281)
 */
export declare function deepMerge(objects: Array<Obj<any>>, options?: DeepMergeOptions): Obj<any>;