anchor.diff:  [[ccr-getting-started-leader-index]]
   === Creating a leader index
   
  -Leader indices require a special index setting to ensure that the operations
  -that need to be replicated are available when the follower requests them from
  -the leader. This setting is used to control how many soft deletes are retained.
  -A _soft delete_ occurs whenever a document is deleted or updated. Soft deletes
  -can be enabled only on new indices created on or after {es} 6.5.0, and enabled
  -by default on new indices created on or after {es} 7.0.0.
  -
   In the following example, we will create a leader index in the remote cluster:
   
   [source,js]
  
positive.code: --------------------------------------------------
  // CONSOLE
  // TEST[continued]
  <1> Sets that up to 1024 soft deletes will be retained.
  
  [float]
  [[ccr-getting-started-follower-index]]
  
negative.code:   "settings" : {
      "index" : {
        "number_of_shards" : 1,
        "number_of_replicas" : 0
      }
    },
    "mappings" : {
  