Returns a new lazy Iterable with all elements that have type
The matching elements have the same order in the returned iterable as they have in iterator.
This method returns a view of the mapped elements. Iterating will not cache results, and thus iterating multiple times over the returned Iterable may yield different results, if the underlying elements change between iterations.
@override Iterable<T> whereType<T>() => _base.whereType<T>();