/code></span></dt><dd><p>
      an array of length <em class="parameter"><code>nargs</code></em>, containing the actual
      parameter values
     </p></dd><dt><span class="term"><code class="literal">const char * <em class="parameter"><code>nulls</code></em></code></span></dt><dd><p>
      an array of length <em class="parameter"><code>nargs</code></em>, describing which
      parameters are null
     </p><p>
      If <em class="parameter"><code>nulls</code></em> is <code class="symbol">NULL</code> then
 