Returns a new set with the elements of this that are not in other
.
That is, the returned set contains all the elements of this Set that are not elements of other
according to other.contains
.
Set<E> difference(Set<Object> other);
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Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.5.0/dart-core/Set/difference.html