anchor.diff:          "number_of_shards" : 1
       },
       "mappings" : {
  -        "type1" : {
  +        "_doc" : {
               "_source" : { "enabled" : false }
           }
       }
  
positive.code: // CONSOLE
  // TEST[s/^/DELETE _template\/template_1\n/]
  
  The above will disable storing the `_source` on all `type1` types, but
  for indices that start with `te*`, `_source` will still be enabled.
  Note, for mappings, the merging is "deep", meaning that specific
  object/property based mappings can easily be added/overridden on higher
  
negative.code:     "number_of_shards": 1
    },
    "mappings": {
      "_doc": {
        "_source": {
          "enabled": false
        },
  