def plan_step
import bend-edit-distance@0.2.2.0/src/Batch.bend as Batchimport Base
118def plan_step(groups: Group & Group,
119 next: List<&2, WeightedJob> -> List<&2, WeightedJob> -> Plan) -> Plan:
120 (left, right) = groups
121 next(group_jobs(left), group_jobs(right))