@EverythingIsNonnullByDefault

# Package owl.collections

- Class Summary
  Class | Description
  --- | ---
  Collections3 |
  Either<A,​B> |
  LabelledTree<L1,​L2> |
  LabelledTree.Leaf<L1,​L2> |
  LabelledTree.Node<L1,​L2> |
  UpwardClosedSet | Bucket-based implementation of an upward-closed set.
  ValuationSet |
  ValuationTree<E> |
  ValuationTree.Leaf<E> |
  ValuationTree.Node<E> |
  ValuationTrees |