function getAnyValue(obj) {
  for (const key in obj) {
    return obj[key];
  }
}
Returns one value from the object map, if any exists.
For map literals the returned value will be the first one in most of the
browsers (a know exception is Konqueror).
@param {?Object<K,V>} obj The object to pick a value from.
@return {V|undefined} The value or undefined if the object is empty.
@template K,V