Using PropTypes when immutable-js in react-js

I came here looking to find a solution that would allow either an array or any sort of iterable object from ImmutableJS to be passed as the prop. In case anyone else finds this useful, here's what I came up with:

PropTypes.oneOfType([
  PropTypes.instanceOf(Array),
  PropTypes.instanceOf(Immutable.Iterable)
]).isRequired