public void description(Object o) {
    Script script = (Script) o;

    int base = script.getBaseLineNumber();
    int extent = script.getLineExtent();

    // later also test other locations
    for (int i = base; i < base + extent; i++) {
      ((DescLine) getDmgr().getDescriptor(DescLine.class)).describe(script, i);
    }
  }