anchor.diff:  
   [source,console]
   --------------------------------------------------
  -PUT /index
  +PUT /products
   {
       "mappings": {
           "properties" : {
               "resellers" : { <1>
                   "type" : "nested",
                   "properties" : {
  -                    "name" : { "type" : "text" },
  +                    "reseller" : { "type" : "text" },
                       "price" : { "type" : "double" }
                   }
               }
  
positive.code:     }
  }
  --------------------------------------------------
  // TESTSETUP
  <1> The `resellers` is an array that holds nested documents under the `product` object.
  
  The following aggregations will return the minimum price products can be purchased in:
  
  [source,console]
  --------------------------------------------------
  GET /_search
  {
      "query" : {
          "match" : { "name" : "led tv" }
  
negative.code:   ...
    "aggregations": {
      "resellers": {
        "doc_count": 2,
        "min_price": {
          "value": 350
        }
  