[
  {
    "text": "Example banner message",
    "icon": "inbox",
    "button": {
      "label": "Read documentation",
      "url": "https://uportal-project.github.io/uportal-app-framework/messaging.html"
    }
  },
  {
    "text": "Secondary test banner",
    "button": {
      "label": "Do thing",
      "url": "#"
    }
  }
]