Can fielddata_fields be used in mget request?

I am trying to get the fielddata from a not_analyzed field in Multi Get query. It is working fine in _search queries.

This is what I've tried with no luck:

curl -XGET "http://es:9200/articles/article/_mget/?pretty&fielddata_fields=url" -d '{"ids" : ["5763197951"]}'

curl -XGET "http://es:9200/articles/article/_mget/?pretty" -d '{"fielddata_fields": ["url"], "ids" : ["5763197951"]}'

curl -XGET "http://es:9200/articles/article/_mget/?pretty" -d '{"docs" : [{"_id" : "5763197951", "fielddata_fields": ["url"]}]}'

It looks like fielddata_fields is completely ignored, since I always get this result:

{
  "docs" : [ {
    "_index" : "articles",
    "_type" : "article",
    "_id" : "5763197951",
    "_version" : 1,
    "found" : true
  } ]
}

I'm running ES version 1.4.4 with JVM: 1.8.0_31
Edit: I just tried the above with a test database running ES 2.2.2 with the same results...

My index mapping is the following:

{
   "articles":{
      "mappings":{
         "article":{
            "_all":{
               "enabled":false
            },
            "_source":{
               "enabled":false
            },
            "properties":{
               "content":{
                  "type":"string",
                  "norms":{
                     "enabled":false
                  }
               },
               "url":{
                  "type":"string",
                  "index":"not_analyzed"
               }
            }
         }
      },
      "settings":{
         "index":{
            "refresh_interval":"30s",
            "number_of_shards":"20",
            "analysis":{
               "analyzer":{
                  "default":{
                     "filter":[
                        "icu_folding",
                        "icu_normalizer"
                     ],
                     "type":"custom",
                     "tokenizer":"icu_tokenizer"
                  }
               }
            },
            "number_of_replicas":"1"
         }
      }
   }
}

_mget is not search, it is a get by ID.
Fielddata never applies to a get.

Thank you for the reply!