Do a suggestion query on multi-fields of differents index

[Akimbo]

Is it possible to do a suggestion query on multi-fields of differents index ? I want to do the query on the "content" field of one index and on the "message" field of another index.

I have tried it without success :

GET _search
{
  "suggest": {
    "text" : "build",
    "my-suggest-1" : {
      "term" : {
        "field" : "message"
      }
    },
    "my-suggest-2" : {
       "term" : {
        "field" : "content"
       }
    }
  }
}