def in_ref_rows
import unified-nsga-iii@0.2.2.0/survival.bend as Survivalimport Base
import unified-nsga-iii@0.2.2.0/util.bend as Util
150def in_ref_rows(+r: Nat, rows: List<&2, NRow>) -> List<&2, NRow>:
151 match rows:
152 case Nil{}:
153 Nil{}
154 case +row <> rest:
155 Util.keep_if(NRow, row, in_ref_rows(r, rest), Nat.is_eq(nrow_r(row), r))