Collections
class.
If the argument that is passed to an unmodifiable collection wrapper is already immutable, such a wrapping becomes redundant.
Example:
List<String> x = Collections.unmodifiableList(Collections.singletonList("abc"));
After the quick-fix is applied:
List<String> x = Collections.singletonList("abc");
In order to detect the methods that return unmodifiable collections, the
inspection uses the org.jetbrains.annotations.Unmodifiable
and org.jetbrains.annotations.UnmodifiableView
annotations.
Use them to extend the inspection to your own unmodifiable collection
wrappers.
New in 2020.3