C</span><span id="errLabel-2304-61-1" role="tooltip" class="error-tooltip">Cannot find name 'C'.</span></span>) {
  <span class="tm-kw">if</span> (<span class="tm-mth">isE</span>(<span class="tm-vr">x</span>)) {
    <span class="tm-cmt">// x is C & E here</span>
  }
  <span class="tm-kw">else</span> {
    <span class="tm-cmt">// x is still just C here</span>
  }
}<hr class="error-divider"><div class="listed-error"><div class="error-line">Cannot find name 'E'.</div></div><div class="listed-error"><div class=