anchor.diff:  
   `metric`::
     (enum) Defines which additional metrics are included in the response.
  -  `executing_watches`::: Includes the current executing watches in the response.
  +  `pending_watches`::: Includes the current executing watches in the response.
     `queued_watches`::: Includes the watches queued for execution in the response.
     `_all`::: Includes all metrics in the response.
   
  
positive.code: 
  [source,js]
  --------------------------------------------------
  GET _xpack/watcher/stats?metric=executing_watches
  --------------------------------------------------
  // CONSOLE
  
  
negative.code: watch that is currently executing. This information includes the `watch_id`,
  the time its execution started and its current execution phase.
  
  To include this metric, the `metric` option should be set to `pending_watches`
  or `_all`. In addition you can also specify the `emit_stacktraces=true`
  parameter, which adds stack traces for each watch that is being executed. These
  stack traces can give you more insight into an execution of a watch.
  