anchor.diff:  }
   --------------------------------------------------
   
  +[[_order]]
   ==== Order
   
   By default the composite buckets are sorted by their natural ordering. Values are sorted
  
positive.code: [[_terms]]
  ===== Terms
  
  The `terms` value source is equivalent to a simple `terms` aggregation.
  The values are extracted from a field exactly like the `terms` aggregation.
  
  Example:
  
negative.code: }
  ----
  ////
  
  Although similar, the `terms` value source doesn't support the same set of
  parameters as the `terms` aggregation. For other supported value source
  parameters, see:
  
  * <<_order>>
  * <<_missing_bucket>>
  
  [[_histogram]]
  ===== Histogram
  