This is an extension and not part of the main GoJS library.
Note that the API for this class may change at any time.
Extensions can be found in the GoJS kit under the
See the Extensions intro page for more information.
This only works for angle === 0 or angle === 180.
This layout assumes Links are automatically routed in the way needed by fishbone diagrams, by using the FishboneLink class instead of go.Link.
If you want to experiment with this extension, try the Fishbone Layout sample.
This override stops links from being committed since the work is done by the FishboneLink class.
Shifts subtrees within the fishbone based on angle and node spacing.