lt;out-var&gt; [ERROR_VARIABLE &lt;error-var&gt;]
         <a class="reference internal" href="#member">MEMBER</a> &lt;json-string&gt;
         [&lt;member|index&gt; ...] &lt;index&gt;)
  string(JSON &lt;out-var&gt; [ERROR_VARIABLE &lt;error-var&gt;]
         <a class="reference internal" href="#set">SET</a> &lt;json-string&gt;
         &lt;member|index&gt; [&lt;member|index&gt; ...] &lt;value&gt;)
  string(JSON &lt;out-var&gt; [ERROR_VARIABLE &lt;error-var&gt;]
         <a class="reference internal" href="