anchor.diff:  
   Requires the following privileges:
   
  -* cluster: `manage_ml` (the `machine_learning_admin` built-in role grants this 
  +* cluster: `manage_ml` (the `machine_learning_admin` built-in role grants this
     privilege)
   * source indices: `read`, `view_index_metadata`
   * destination index: `read`, `create_index`, `manage` and `index`
  
positive.code:   }
  }
  --------------------------------------------------
  // TEST[setup:setup_logdata]
  
  
  The API returns the following result:
  
negative.code: Defines the number of categories for which the predicted probabilities are
  reported. It must be non-negative or -1. If it is -1 or greater than the total
  number of categories, probabilities are reported for all categories; if you have
  a large number of categories, there could be a significant effect on the size of your destination index. Defaults to 2.
  +
  --
  NOTE: To use the
  {ml-docs}/ml-dfa-classification.html#ml-dfanalytics-class-aucroc[AUC ROC]
  evaluation method, `num_top_classes` must be set to `-1` or a value greater than
  or equal to the total number of categories.
  
  --
  