"cm-variable">namespace</span> <span class="cm-variable">X</span> {
  <span class="cm-keyword">export</span> <span class="cm-keyword">var</span> <span class="cm-variable">Y</span>: <span class="cm-variable-3">number</span>;
  <span class="cm-keyword">export</span> <span class="cm-variable">namespace</span> <span class="cm-variable">Z</span> {
    <span class="cm-keyword">export</span> <span class="cm-keyword">class</span> <span class="cm-variable">C</span> { }
  }
}
<span class="cm-variable">type</span> <sp