anchor.diff:  --------------------------------------------------
   
   Search results are disambiguated the same way as the indices are disambiguated in the request. Even if index names are
  -identical these indices will be treated as different indices when results are merged. All results retrieved from a remote index
  +identical these indices will be treated as different indices when results are merged. All results retrieved from a
  +remote index
   will be prefixed with their remote cluster name:
   
   [source,js]
  
positive.code: }
  --------------------------------------------------
  
  In contrast to the `tribe` feature cross cluster search can also search indices with the same name on different clusters:
  
  
  [source,js]
  --------------------------------------------------
  
negative.code: === Cross cluster search settings
  
  * `search.remote.connections_per_cluster` - the number of nodes to connect to per remote cluster. The default is `3`
  * `search.remote.initial_connect_timeout` - the time to wait for remote connections to be established when the node
  starts. The default is `30s`.
  * `search.remote.node_attribute` - a node attribute to filter out nodes that are eligible as a gateway node in the
  remote cluster. For instance a node can have a node attribute `node.attr.gateway: true`  such that only nodes with this
   attribute will be connected to if `search.remote.node_attribute` is set to `gateway`
  
  