<map id="ystdex::vseq::at&lt; _tSeq, 0, when&lt; true &gt; &gt;" name="ystdex::vseq::at&lt; _tSeq, 0, when&lt; true &gt; &gt;">
<area shape="rect" id="node1" title=" " alt="" coords="5,200,179,241"/>
<area shape="rect" id="node2" href="$d9/d4e/a04307.xhtml" title=" " alt="" coords="25,109,159,151"/>
<area shape="rect" id="node3" href="$d9/d4e/a04307.xhtml" title="取序列第一个元素。" alt="" coords="19,5,165,47"/>
</map>
