form.html" title="Concept ObjectTransform">ObjectTransform</a>.
          </p>
<p>
            Unless specialized for a type
            <code class="computeroutput">T</code>, <code class="computeroutput">proto::is_callable&lt;T&gt;::value</code>
            is computed as follows:
            </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"><p>
                  If <code class="computeroutput">T</code> is a template type
                  <code c