core/src/main/java/org/sakaiproject/nakamura/api/lite/authorizable/Group.java
@Override
    public Map<String, Object> getPropertiesForUpdate() {
        if (!readOnly && membersModified) {
            modifiedMap.put(MEMBERS_FIELD, StringUtils.join(members, ';'));
        }
        Map<String, Object> propertiesForUpdate = super.getPropertiesForUpdate();
        return propertiesForUpdate;
    }
@Override
    public Map<String, Object> getPropertiesForUpdate() {
        if (!readOnly && membersModified) {
            modifiedMap.put(MEMBERS_FIELD, StringUtils.join(members, ';'));
        }
        Map<String, Object> propertiesForUpdate = super.getPropertiesForUpdate();
        return propertiesForUpdate;
    }
{@inheritDoc}