public function delete()
{
//delete associated classes
$filter = new field_filter('courseid', $this->id);
pmclass::delete_records($filter, $this->_db);
//clean up associated records
curriculumcourse::delete_records($filter, $this->_db);
coursetemplate::delete_records($filter, $this->_db);
// ELIS-8528: Remove LOs/completion elements.
coursecompletion::delete_records($filter, $this->_db);
parent::delete();
$context = \local_elisprogram\context\course::instance($this->id);
$context->delete();
}