anchor.diff:  
   GET _cat/nodes
   --------------------------------------------------
  +// TEST[continued]
   
   The `status` column returned by `_cat/health` shows the health of each node
   in the cluster: `red`, `yellow`, or `green`.
  
positive.code: --------------------------------------------------
  POST _ml/set_upgrade_mode?enabled=true
  --------------------------------------------------
  +
  When you disable upgrade mode, the jobs resume using the last model state that 
  was automatically saved. This option avoids the overhead of managing active jobs 
  
negative.code: --------------------------------------------------
  GET _cat/nodes
  --------------------------------------------------
  // TEST[continued]
  --
  
  . *Reenable shard allocation.*
  