 : 
  <span><span class="label">fold</span>:<span><span>(<span class="type-var">'t</span>, <span class="type-var">_</span>, int)</span> <span class="xref-unresolved">IStdlib</span>.IStd.Container.fold</span> <span class="arrow">&#45;&gt;</span></span>
  <span><span class="type-var">'t</span> <span class="arrow">&#45;&gt;</span></span>
  <span>int <span class="arrow">&#45;&gt;</span></span>
  bool</span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-forto"><a href="#val-fo