Setup

```json
PUT /index1
{
  "mappings": {
    "foo": {
      "properties": {
        "suggest": {
          "type": "completion"
        }
      }
    }
  }
}

PUT /index1/foo/1
{
  "suggest": {
    "input": ["bar"],
    "output": "From Index 1"
  }
}

PUT /index2
{
  "mappings": {
    "foo": {
      "properties": {
        "suggest": {
          "type": "completion"
        }
      }
    }
  }
}

PUT /index2/foo/1
{
  "suggest": {
    "input": ["bar"],
    "output": "From Index 2"
  }
}
```

Suggest Request
```json
GET /index1,index2/_search?search_type=count
{
  "suggest": {
    "mysuggestions": {
      "text": "b",
      "completion": {
        "field": "suggest"
      }
    }
  }
}
```


Response
```json
{
  "took": 3,
  "timed_out": false,
  "_shards": {
    "total": 10,
    "successful": 10,
    "failed": 0
  },
  "hits": {
    "total": 2,
    "max_score": 0,
    "hits": []
  },
  "suggest": {
    "mysuggestions": [
      {
        "text": "b",
        "offset": 0,
        "length": 1,
        "options": [
          {
            "text": "From Index 1",
            "score": 1
          },
          {
            "text": "From Index 2",
            "score": 1
          }
        ]
      }
    ]
  }
}
```