anchor.diff:      "stored_fields": [ "_id" ],
       "query" : {
           "match": {
  -            "content": {
  +            "comment": {
                   "query": "foo bar"
               }
           }
  
positive.code:     "highlight" : {
          "tags_schema" : "styled",
          "fields" : {
              "content" : {}
          }
      }
  }
  
negative.code:     },
      "highlight" : {
          "fields" : {
              "comment" : {"type" : "plain"}
          }
      }
  }
  