digraph nestjs1 {
  rankdir=LR

  Controleur [shape="rectangle"]
  Controleur -> Service -> { S1 S2 S3 Sn }
  Sn [label="...", color="dimgrey"]

  subgraph cluster_Module {
    Controleur; Service

    label="Module"
    style=dotted
  }

  subgraph cluster_S1 {
    S1
    style=dotted
  }

  subgraph cluster_S2 {
    S2
    style=dotted
  }

  subgraph cluster_S3 {
    S3
    style=dotted
  }
}