return getNumberOfTotalEnrolmentsInThisCourse() == 1;
List<Enrolment> enrollments = getStudentCurricularPlan().getActiveEnrolments(getCurricularCourse()); for (Enrolment enrollment : enrollments) { if (enrollment.getExecutionPeriod().isBefore(this.getExecutionPeriod())) { return Boolean.FALSE; } } return Boolean.TRUE;
    public Boolean isFirstTime() {        return getNumberOfTotalEnrolmentsInThisCourse() == 1;    }