how to avoid nodes overlapping cluster labels

[christianvoigt]

Hi, thanks for taking care of dagre!

I am currently experimenting with clusters, clusterLabelPos:'top' and rankDir:'BT'. This leads to a layout where the nodes within a cluster are positioned over the cluster labels. Is there any chance to get them out of the way?

In dagrejs/dagre-d3#156 @cpettitt said:

"Looks good! It would be possible to get the edges to route around the cluster label by doing some of this in dagre - e.g. adding a dummy node to the cluster at the right rank with the size of the label."

Is it easy to add such dummy nodes?