Labels for 'regions' / groups.

[azw413]

When viewing larger graphs, it is not desirable to show labels for nodes or links since there's just too many of them. Instead what would be nice is to have a single label in the centre of a region of nodes belonging to the same 'group'. At the moment, if I specify each node is a member of a group then they are auto-coloured the same, which is nice. It would be great to be able to attach a label to that group id and have that label positioned in the centre of that cluster.