out co"><span class="r-pr">#&gt;</span>  [1] "..mro.."          "..str.."          "..len.."          "..class.."       </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  [5] "..new.."          "has_attr"         "del_attr"         "..repr.."        </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  [9] "set_attr"         "..type.."         "get_attr"         "..dir.."         </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [13] "..methods.."      "..method_env.."   