swimlane LR
          subgraph "`one`"
            start -- l1 --> cat --> rat
            end
          subgraph "`two`"
            monkey -- l2 --> dog --> done2
            end
          subgraph "`three`"
            cow --> horse --> done3
            cow --> sheep --> done3
          end
          cat --> monkey
          cow --> dog
          

swimlane LR
    subgraph "`one`"
      start -- l1 --> cat --> rat
      end
    subgraph "`two`"
      monkey -- l2 --> dog --> done2
      end
    subgraph "`three`"
      cow --> horse --> done3
      cow --> sheep --> done3
    end
    subgraph "`four`"
      panda -->
      kangaroo --> done4
    end
cat --> monkey
    cow --> dog
    kangaroo --> sheep
    

swimlane LR
    subgraph "`three`"
      bat --> cow
      cow --> sheep
    end
    subgraph "`four`"
      panda -->
      kangaroo --> done4
    end
    kangaroo --> sheep