protected function get_sample_courseid($sampleid) {
        global $DB;

        if (empty($this->samplecourses[$sampleid])) {
            $course = enrol_get_course_by_user_enrolment_id($sampleid);
            $this->samplecourses[$sampleid] = $course->id;
        }

        return $this->samplecourses[$sampleid];
    }