| -1616475241 | | Utilities for working with generators | succeeds | 0 |
| -1602642462 | | Lightweight, general-purpose utilities for working with tree-structured data. | succeeds | 0 |
| -1604530907 | | Generic interfaces and convenient utilities for using relations. | succeeds | 0 |
| -1604469791 | | Collectively-defined contracts for commonly encountered types. | succeeds | 0 |