We are currently using the auto layout capabilities of GoDiagram (22.214.171.124). More
specifically, we are using the class GoLayoutLayeredDigraph.
Is it possible to fix the positions of some nodes, so that the layout algorithm of
GoLayoutLayeredDigraph only moves other nodes? We have seen that the algorithm
GoLayoutForceDirected supports the fixing of nodes but GoLayoutLayeredDigraph
seems to provide no obvious way to achieve this.