s="anchor" aria-label="anchor" href="#arg-layer-id"></a></dt>
<dd><p>The ID of the layer to move.</p></dd>


<dt id="arg-before-id">before_id<a class="anchor" aria-label="anchor" href="#arg-before-id"></a></dt>
<dd><p>The ID of an existing layer to insert the new layer before. <strong>Important</strong>: this means that the layer will appear <em>immediately behind</em> the layer defined in <code>before_id</code>. If omitted, the layer will be appended to the end of the layers array and appear above all othe