al">)</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="variables_map.html#id-1_3_31_9_11_1_1_4_7-bb">private member functions</a></span>
  <span class="keyword">virtual</span> <span class="keyword">const</span> <a class="link" href="variable_value.html" title="Class variable_value">variable_value</a> <span class="special">&amp;</span> <a class="link" href="variables_map.html#id-1_3_31_9_11_1_1_4_7_1-bb"><span class="identifier">get</span></a><span class="special">(</spa