Improve get number of visits per visit duration

Hello guys,

can you extend this API call, to give back bounce_rate and bounce_count as well? Or do you have any “right way” workaround to get back these values per length?

https://demo.piwik.org/?module=API&method=VisitorInterest.getNumberOfVisitsPerVisitDuration&idSite=7&period=day&date=today&format=JSON&token_auth=anonymous