ng_of_physicalloc : <span>?len:int <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-physicalloc">physicalloc</a> <span class="arrow">&#45;&gt;</span></span> string</span></code></div><div class="spec-doc"><p>Serialize a value of type <a href="#type-physicalloc"><code>physicalloc</code></a> into a JSON string.</p><ul class="at-tags"><li class="parameter"><span class="at-tag">parameter</span> <span class="value">len</span> <p>specifies the initial length of the buffer used internally. Default: