anchor.diff:  ----
   PUT /my_index
   {
  -    "mappings": {
  +    "mappings" : {
           "properties" : {
               "obj1" : {
                   "type" : "nested"
  
positive.code: 
  You can use this parameter to query multiple indices that may not contain the
  field `path`.
  --
negative.code:     }
  }
  ----
  // TEST[continued]
  
  [[nested-top-level-params]]
  ==== Top-level parameters for `nested`
  