On 2012-11-29 20:25, Tom Schindl wrote: > Am 29.11.12 19:42, schrieb Tom Eugelink: > I think storing the constraint on the owner is not a good idea because you don't have an API for e.g. bulk-operations. The Layout#add(Node,Constraint) API should only be a convenience one for developers. Can you give an example of such bulk operations? Tom