e</span><span class="p">(</span><span class="nv">base</span><span class="p">:</span> <span class="kt"><a href="../Structs/BaseTypeData.html">BaseTypeData</a></span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">Data</span><span class="p">?</span></code></pre>

                          </div>
                        </div>
                        <div>
                          <h4>Parameters</h4>
                          <table class="graybox">
                            <tbody>
 