name parameters for clarity

	//

	// The Modules passed to the visit function should not be retained outside of the visit function, they may be

	// invalidated by future mutators.

	WalkDeps(visit func(Module, Module) bool)

	WalkDeps(visit func(child, parent Module) bool)

	// WalkDepsBlueprint calls visit for each transitive dependency, traversing the dependency

	// tree in top down order.  visit may be called multiple times for the same (child, parent)