In complex projects where there are many transitive dependencies it would be great to know the "jar-path-origin" of a type.
usually to find out from which jar a type is coming from i use Open Type (shortcut <Ctrl>+<Shift>+T). at bottom of dialog now i can see either the source folder or deployed jar origin.
in complex situations with many transitive dependencies m2eclipse could help out here to show the pom-dependency path to the origin jar.
this comes very handy, when to analyze and to chuck away redundant dependencies.
i think it is enough to make this visible by text (something like foo:bar:1.2 -> foo:other:2.3) at the bottom of Open-Type dialog.
a visualized graph would be overkill here in my view.