Updated Javadoc for DeckPanel.getVisibleWidget() Fixes issue 7680. Change-Id: I457b2238ee2f36b0958fed47ed012329a860e0d1 Review-Link: https://gwt-review.googlesource.com/#/c/1720/ Review by: goktug@google.com git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@11460 8db76d5a-ed1c-0410-87a9-c151d255dfc7