Guava Optional, Function, Predicate, Supplier and most Guava utilities from com.google.common.collect have been replaced with their JDK counterparts. Most of these Guava features are available in the JDK by now, so it is unnecessary to bother with a third-party library. Although it is not required, we would recommend that you also refactor these Guava usages in your code for consistency.

(CMS-18659)