dependency graph

[Vlad Levenfeld via Digitalmars-d-learn]

A colleague of mine had asked me if I could produce some kind of 
object/module dependency type of graph for a D project I've got. 
I'm not sure what these are called but I've seen them before for 
inheritance hierarchies in C++ projects. (I don't tend to use 
inheritance so I suspect something exactly like this would not be 
terribly helpful in my case but some kind of general layout of 
symbol dependencies would be).

Is there any utility out there for building a visual 
representation of my project?