Author: Zig Tan
MDL-61881 report_outline: Implement null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=df5f0c8f932d69f187924603b693975dbba6e700
http://github.com/moodle/moodle/commit/df5f0c8f932d69f187924603b693975dbba6e700
+ 3.4 en [privacy:metadata,report_outline]