 <a class="code" href="class_v_s_t_g_u_i_1_1_interface.html">Interface</a></div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;{</div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    <span class="keyword">virtual</span> <a class="code" href="struct_v_s_t_g_u_i_1_1_optional.html">Optional&lt;UTF8String&gt;</a> <span class="keyw