HtmlMultipleHiddenField hiddenExtraCurricularEnrollments = new HtmlMultipleHiddenField();
hiddenExtraCurricularEnrollments.bind(getRenderer().getInputContext().getMetaObject(), "extraCurricularEnrolments");
hiddenExtraCurricularEnrollments.setConverter(new ErasmusExtraCurricularEnrolmentConverter());
hiddenExtraCurricularEnrollments.setController(controller);
container.addChild(hiddenEnrollments);
container.addChild(hiddenDegreeModulesToEvaluate);
container.addChild(hiddenExtraCurricularEnrollments);
generateGroup(container, getBolonhaStudentEnrollmentBean().getStudentCurricularPlan(), getBolonhaStudentEnrollmentBean()
.getRootStudentCurriculumGroupBean(), getBolonhaStudentEnrollmentBean().getExecutionPeriod(), 0);