Oleksii Kachaiev b3500f50a6 Java 8 migration. Replace Collection.newSetFromMap with ConcurrentHashMap.newKeySet (#8756) ... Motivation: Simplify code with newer Java API. It also reduce levels of indirection, but I don't think we can gain any visible performance improvements out of this. Modifications: Replace Collection.newSetFromMap(new ConcurrentHashMap()) with ConcurrentHashMap.newKeySet(). Result: Use Java8 APIs.		2019-01-22 16:41:15 +01:00
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main	Java 8 migration. Replace Collection.newSetFromMap with ConcurrentHashMap.newKeySet (#8756)	2019-01-22 16:41:15 +01:00
test	Java 8 migration: Use diamond operator (#8749)	2019-01-22 16:07:26 +01:00