lass="odoc-spec"><div class="spec value anchored" id="val-string_of_transitive_callee_kind"><a href="#val-string_of_transitive_callee_kind" class="anchor"></a><code><span><span class="keyword">val</span> string_of_transitive_callee_kind : 
  <span><span class="optlabel">?len</span>:int <span class="arrow">&#45;&gt;</span></span>
  <span><a href="#type-transitive_callee_kind">transitive_callee_kind</a> <span class="arrow">&#45;&gt;</span></span>
  string</span></code></div><div class="spec-doc"><p>Serialize 