anchor.diff:  {
       "suggest": {
           "song-suggest" : {
  -            "prefix" : "nir",
  -            "completion" : {
  -                "field" : "suggest"
  +            "prefix" : "nir", <1>
  +            "completion" : { <2>
  +                "field" : "suggest" <3>
               }
           }
       }
  
positive.code: 
  [source,js]
  --------------------------------------------------
  POST music/_search?size=0
  {
      "_source": "suggest",
      "suggest": {
          "song-suggest" : {
              "prefix" : "nir",
              "completion" : {
                  "field" : "suggest"
              }
          }
      }
  
negative.code: --------------------------------------------------
  // CONSOLE
  // TEST[continued]
  
  <1> Prefix used to search for suggestions
  <2> Type of suggestions
  <3> Name of the field to search for suggestions in
  
  returns this response:
  
  