RegressionNode

Internal tree node. The hot update path touches only the leaf an observation routes to; internal split nodes are never written by RegressionTree.update. Splits may carry an optional carryover arm: a one-shot snapshot of the pre-split aggregate captured at the moment a leaf converts into a split, plus any orphaned aggregates folded in by mixed-structure merges. Subtree aggregates include the carryover but the hot path never reads or writes it.

Inheritors