export declare function deepClone<T>(obj: T): T;
/**
 * Avoid "can't access property of undefined" errors in a more readable way.
 * @param fn Function that wraps a nested property access
 * @param defaultVal Optional - the value to return if property access failed
 */
export declare function getSafe<T>(fn: () => T, defaultVal?: T): T | undefined;
/**
 * Performs a deep merge of `source` into `target`.
 * Mutates `target` only but not its objects and arrays.
 *
 * @author inspired from https://gist.github.com/ahtcx/0cd94e62691f539160b32ecda18af3d6#gistcomment-3120712
 */
export declare function deepMerge(...objects: object[]): object;