Author: David Monllaó
MDL-65633 analytics: New interfaces for time-splitting methods
http://git.moodle.org/gw?p=moodle.git;a=commit;h=3cb0aaaa8caccd7e840972e462fe2783528e8969
http://github.com/moodle/moodle/commit/3cb0aaaa8caccd7e840972e462fe2783528e8969
+ 3.8 en [errorcannotusetimesplitting,core_analytics]