This files describes API changes in /mod/quiz/report/statistics/*,
information provided here is intended especially for developers.

=== 4.0.9 ===

* The methods quiz_statistics_report::calculate_questions_stats_for_question_bank and get_all_stats_and_analysis
  (which are really private to the quiz, and not part of any API you should be using) now have a new
  optional argument $calculateifrequired.

* In the past, the methods \quiz_statistics\calculator::get_last_calculated_time() and calculator::get_cached()
  only returned the pre-computed statistics if they were computed less than 15 minutes ago. Now, they will
  always return any computed statistics that exist. The constant calculator::TIME_TO_CACHE will be
  deprecated in Moodle 4.3.


=== 3.2 ===

* The function quiz_statistics_graph_get_new_colour() is deprecated in favour of the
  funtionality present in the new charting library.
* The function quiz_statistics_renumber_placeholders() is removed as the changes
  in MDL-31243 and MDL-27072 make this redundant.