// start a composite
node.startComposite("HelloworldContrib", "lifecycle.composite");
// send a message to each client
Helloworld hwCE = node.getService(Helloworld.class, "HelloworldClientCE");
System.out.println(hwCE.sayHello("name"));
Helloworld hwC = node.getService(Helloworld.class, "HelloworldClientC");
System.out.println(hwC.sayHello("name"));
Helloworld hwS = node.getService(Helloworld.class, "HelloworldClientC");
System.out.println(hwS.sayHello("name"));
// stop a composite
node.stopComposite("HelloworldContrib", "lifecycle.composite");
// uninstall a constribution