bel-meta label-meta-value" title="Used to store default values for fields and function arguments.">@:value(&quot;down&quot;)</span><span class="label label-static">static</span><span class="label label-inline">inline</span><span class="label">read only</span><a href="#DOWN"><span class="identifier">DOWN</span></a>:<span class="type">String</span><span> = &quot;down&quot;</span></code></h3><div class="doc"><p>按下</p></div></div><div class="field "><a name="OUT"></a><h3 class="anchor"><code><span class="la