Layout with autocomplete

{
   "sections": [
      {
         "name": "contactInformation",
         "label": "Contact Information",
         "active": true,
         "cols": 3,
         "rows": [
            [
               {
                  "apiName": "FirstName"
               },
               {
                  "apiName": "LastName"
               },
               {
                  "apiName": "Email"
               }
            ],
            [
               {
                  "apiName": "MailingCity",
                  "autocomplete": [
                     "Paris",
                     "New York",
                     "London",
                     "Rome"
                  ]
               }
            ]
         ]
      }
   ]
}