text: /**
   * 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(obj, props) {
  	for (let i in props) obj[i] = props[i];
  	return /** @type {O & P} */ (obj);
  }
  
  /**
   * Check if two objects have a different shape
   * @param {object} a
   * @param {object} b
   * @returns {boolean}
   */
  export function shallowDiffers(a, b) {
  	for (let i in a) if (i !== '__source' && !(i in b)) return true;
  	for (let i in b) if (i !== '__source' && a[i] !== b[i]) return true;
  	return false;
  }
  