anchor.diff:  
   * <<painless-top-hits>>
   * <<painless-time-features>>
  -* <<painless-group-by>>
  +// * <<painless-group-by>>
   * <<painless-bucket-script>>
   * <<painless-count-http>>
   * <<painless-compare>>
  
positive.code: | "Mozilla/5.0 (X11; Linux i686) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.50 Safari/534.24" | "safari"
  | "Mozilla/5.0 (X11; Linux x86_64; rv:6.0a1) Gecko/20110421 Firefox/6.0a1" | "firefox"
  |===
  
  [[painless-bucket-script]]
  == Getting duration by using bucket script
  
negative.code: <7> Sets `date` based on the timestamp of the document.
  <8> Returns the month value from `date`.
  
  ////
  [[painless-group-by]]
  == Using Painless in `group_by`
  
  