Provides a view of this iterable as an iterable of R
instances.
If this iterable only contains instances of R
, all operations will work correctly. If any operation tries to access an element that is not an instance of R
, the access will throw instead.
When the returned iterable creates a new object that depends on the type R
, e.g., from toList, it will have exactly the type R
.
Iterable<R> cast<R>() => Iterable.castFrom<E, R>(this);
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https://api.dartlang.org/stable/2.0.0/dart-core/Iterable/cast.html