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