jdk/src/share/classes/java/util/OptionalDouble.java
Fri, 12 Jul 2013 11:12:16 -0700 mduigou 8015317: Optional.filter, map, and flatMap
Tue, 19 Mar 2013 16:05:34 -0700 mduigou 8001642: Add Optional<T>, OptionalDouble, OptionalInt, OptionalLong
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