Click each of the 4 styles of link and observe the resulting Location values. Reset the location each time.
Reset
History
vs
RawHistory
vs
FutureHistory
The future GWT History implementation from master +
https://gwt-review.googlesource.com/#/c/5356/
.
Location
Results of various API calls
Links
Several different styles of linking
Events
Log of ValueChangeEvents, newest on top