code: def merge_recursive(obj_a, obj_b, level=False):
      '''
      Merge obj_b into obj_a.
      '''
      return aggregate(obj_a, obj_b, level,
                       map_class=AggregatedMap,
                       sequence_class=AggregatedSequencef merge_recursive(obj_a, obj_b, level=False):
      '''
      Merge obj_b into obj_a.
      '''
      return aggregate(obj_a, obj_b, level,
                       map_class=AggregatedMap,
                       sequence_class=AggregatedSequence)
docs: Merge obj_b into obj_a.