Add .util.sankey and tutorial
#2166
| Job | Run time |
|---|---|
| 41s | |
| 1s | |
| 6m 11s | |
| 6m 3s | |
| 6m 13s | |
| 5m 50s | |
| 6m 8s | |
| 6m 12s | |
| 6m 9s | |
| 5m 0s | |
| 4m 53s | |
| 5m 52s | |
| 5m 51s | |
| 6m 5s | |
| 6m 3s | |
| 5m 59s | |
| 5m 48s | |
| 5m 48s | |
| 5m 48s | |
| 1h 40m 35s |