/**
 * Copied from https://github.com/facebook/fbjs/blob/master/packages/fbjs/src/core/shallowEqual.js
 * Original code is Copyright (c) 2013-present, Facebook, Inc. Licensed as MIT.
 */
/**
 * Check if two values are equal by comparing them shallowly (instead of doing deep compare).
 * React `PureComponent` and `React.memo` use this logic to compare `props` and `state`.
 * @param {any} arg1 First argument
 * @param {any} arg2 Second argument
 * @returns {boolean} true if both arguments are shallowly equal; otherwise false.
 * @example
 * shouldComponentUpdate(nextProps, nextState){
 *   // If `saved` is true, don't re-render. Else, only re-render if props or state are changed.
 *   if (saved) {
 *     return false;
 *   }
 *   return !shallowEqual(nextProps, this.props) || !shallowEqual(nextState, this.state);
 * }
 */
export default function shallowEqual(arg1: any, arg2: any): boolean;