graphviz collapse parallel paths

Question

Is it possible to collapse multiple paths like shown in the picture with graphviz? And if so any suggestions on how this could be achieved?

Answer 1

I'm used to the weeds.
Comment out unwanted nodes and edges and add 3 nodes with shape=point. You might also create invisible edges to/from the new nodes, I did not. This:

digraph ellipsis {
 rankdir=RL
 nodesep=.1
 node [shape=circle]
 {
   rank=same
   B1
   B2 
   B3 
   /* comment out unwanted nodes
   B4
   B5
   ...
   */
   e4  [shape=point]
   e5  [shape=point]
   e6  [shape=point]
   B99
   edge [style=invis]
   B1 ->  B2 ->  B3  -> e4 ->  e5 -> e6 ->  B99
 }
 C -> B1
 C -> B2 
 C -> B3 
 /* comment out unwanted edges
 C -> B4
 */
 C -> B99

 B1  -> A
 B2  -> A
 B3  -> A
 /* comment out more unwanted edges
 B4 -> A
 */
 B99 -> A
}

Produces this: