[perf] Replace HashSet with EnumSet for VisitHints
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Key: MYFACES-3478
URL: https://issues.apache.org/jira/browse/MYFACES-3478
Project: MyFaces Core
Issue Type: Improvement
Reporter: Martin Kočí
Priority: Trivial
hints = new HashSet();
hints.add(VisitHint.SKIP_UNRENDERED)
can be replaced with EnumSet.of(...).
The result is safe to multiple threads (with read operations) - a constant can
be used instead of new instance every time.
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