In answering this question, please refer to the "Swimlanes.graphmlz" example at:
Help >> Example Graphs >> Swimlane >> Swimlanes.graphmlz
"Lane 1" apparently was given two nested lanes "Lane 1.1" and "Lane 1.2".
I could not readily identify what is the procedure for creating such "nested lanes" (with siblings).
While we are at it, how many nesting levels are possible?
The process I am trying to diagram will also require nesting columns. Can columns be nested like in the "Lane 1" example? is the procedure comparable or different?