@startuml
digraph G {
  bgcolor="transparent"
  rankdir="LR";

  Request [
    color="#4C566A",
    style=filled,
    fillcolor="#5e81ac",
    fontcolor="#eceff4"
    shape=box,
    fontname="Verdana",
    fontsize="11pt",
  ];
  Handler [
    color="#4C566A",
    style=filled,
    fillcolor="#5e81ac",
    fontcolor="#eceff4"
    shape=box,
    fontname="Verdana",
    fontsize="11pt",
  ];
  Response [
    color="#4C566A",
    style=filled,
    fillcolor="#5e81ac",
    fontcolor="#eceff4"
    shape=box,
    fontname="Verdana",
    fontsize="11pt",
  ];

  Plugin1 [
    color="#4C566A",
    style="rounded, filled",
    fillcolor="#8fbcbb",
    fontcolor="#4C566A"
    shape=box,
    label="Plugin",
    fontname="Verdana",
    fontsize="11pt",
  ];
  Plugin2 [
    color="#4C566A",
    style="rounded, filled",
    fillcolor="#8fbcbb",
    fontcolor="#4C566A"
    shape=box,
    label="Plugin",
    fontname="Verdana",
    fontsize="11pt",
  ];

  Request -> Plugin1 [color="#4C566A"]
  Plugin1 -> Handler [color="#4C566A"]
  Handler -> Plugin2 [color="#4C566A"]
  Plugin2 -> Response [color="#4C566A"]
}


@enduml