type Split
import unified-nsga-iii@0.2.2.0/non_dominated_sort.bend as NonDominatedSortimport Base
186# Split remaining into (front indices, leftover rows). Same front
187# membership and leftover order as the old index-list peel.
188# |front| + |leftover| = |remaining| by construction.
189type Split is Data:
190 Split{
191 ff: List<&2, Nat>
192 ot: List<&2, Row>
193 }