anchor.diff:      "number_of_shards": 1
     },
     "mappings": {
  -    "type1": {
  +    "_doc": {
         "_source": {
           "enabled": false
         },
  
positive.code:         "number_of_shards" : 1
      },
      "mappings" : {
          "type1" : {
              "_source" : { "enabled" : true }
          }
      }
  
negative.code:         "number_of_shards" : 1
      },
      "mappings" : {
          "_doc" : {
              "_source" : { "enabled" : false }
          }
      }
  