What customization is available for layouts? Is there any documentation of how to override the NGraphLayout methods? The following presents the major problems we are currently facing in the existing NLayeredGraphLayout class:

1. Edges of multiple siblings do not merge and may produce a diagram with too many lines. The attached image shows the existing and desired edge layout.

2. Children vertices do not always appear centered under their corresponding parent vertex, see the second attached image and the sample project that produced the image.

Thank you!
Kirill