anchor.diff:  To access Vert.x, well, you need to enable the `vertx` extension to use this feature.
   If you are creating a new project, set the `extensions` parameter are follows:
   
  -[source, subs=attributes+]
  +[source, shell, subs=attributes+]
   ----
   mvn io.quarkus:quarkus-maven-plugin:{quarkus-version}:create \
       -DprojectGroupId=org.acme \
  
positive.code: Navigate to http://localhost:8080/streaming.html.
  A new greeting should show-up every 2 seconds.
  
  [source]
  ----
  Hello Quarkus! (Thu Mar 21 17:26:12 CET 2019)
  
  
negative.code: ...
  ----
  
  === Using JSON results
  
  Vert.x API heavily relies on JSON, namely the `io.vertx.core.json.JsonObject` and `io.vertx.core.json.JsonArray` types.
  They are both supported as {project-name} web resource return types.
  