tree e19093854473791900c9ddce17fa38b04a7bdf67
parent 5966018381d1161357dbdb1ca38f81dc5730a03a
author David Pursehouse <dpursehouse@collab.net> 1476406760 +0900
committer David Pursehouse <dpursehouse@collab.net> 1476463811 +0900

Replace Guava's Optional with java.util.Optional

Change-Id: I645c81e7b1091f70b4d9020af68dffdc56603974