Remove Organization from Group

gistfile1.java

    public void removeOrganization(String groupId, String id) throws EscidocClientException {
        TaskParam tp = new TaskParam();
        UserGroup updated = c.retrieve(groupId);

        tp.setLastModificationDate(updated.getLastModificationDate());

        // FIXME not optimal
        for (Selector selector : updated.getSelectors()) {
            if (selector.getContent().equals(id)) {
                tp.addResourceRef(selector.getObjid());
            }
        }
        c.removeSelectors(groupId, tp);
    }