lass="label label-meta label-meta-value" title="Used to store default values for fields and function arguments.">@:value(&quot;up&quot;)</span><span class="label label-static">static</span><span class="label label-inline">inline</span><span class="label">read only</span><a href="#UP"><span class="identifier">UP</span></a>:<span class="type">String</span><span> = &quot;up&quot;</span></code></h3><div class="doc"><p>松开</p></div></div></div><h3 class="section">Constructor</h3><div class="fields"><div class