Normalize supported graph plumbing in a graph returned by parseNodeParticleSource.
Directly parsed graphs containing supported plumbing classes require this step before they are passed to any node-particle builder. Graphs
without a candidate class resolve to the same graph object. Validation failures reject the returned Promise.
Normalize supported graph plumbing in a graph returned by
parseNodeParticleSource.Directly parsed graphs containing supported plumbing classes require this step before they are passed to any node-particle builder. Graphs without a candidate class resolve to the same graph object. Validation failures reject the returned Promise.