/**
 * Assign properties from `props` to `obj`
 * @template O, P The obj and props types
 * @param {O} obj The object to copy properties to
 * @param {P} props The object to copy properties from
 * @returns {O & P}
 */
export function assign<O, P>(obj: O, props: P): O & P;
/**
 * Check if two objects have a different shape
 * @param {object} a
 * @param {object} b
 * @returns {boolean}
 */
export function shallowDiffers(a: object, b: object): boolean;