entifier">Nullable</span>(<span class="keyword">Of</span> <span class="identifier">TimeSpan</span>) = <span class="keyword">Nothing</span>,
	Optional <span class="parameter">isFullKey</span> <span class="keyword">As</span> <span class="identifier">Boolean</span> = <span class="keyword">false</span>
) <span class="keyword">As</span> <span class="identifier">Task</span></pre></div></div></div><script type="text/javascript">AddLanguageTabSet("ID0EBCA");</script><h4 class="subHeading">参数</h4><dl><dt><span c