unit)</span> <span class="arrow">&#45;&gt;</span></span>
  <span><a href="../../IR/Procdesc/Node/index.html#type-t">IR.Procdesc.Node.t</a> <span class="arrow">&#45;&gt;</span></span>
  <span>f:<span>(<span>unit <span class="arrow">&#45;&gt;</span></span> <span class="type-var">'a</span>)</span> <span class="arrow">&#45;&gt;</span></span>
  <span class="type-var">'a</span></span></code></div><div class="spec-doc"><p>set to <code>NodePrinter.with_session</code></p></div></div><h3 id="callbacks-management"><a 