[
  {
    "label-elem": {
      "text": "Input with success",
      "class": "block-label has-success"
    }
  },
  {
    "label-elem": {
      "text": "Input with error",
      "attrs": {
        "class": "error"
      }
    },
    "input-elem": {
      "messages": [
        {
          "messageText": "You have not entered anything"
        }
      ]
    }
  }
]