OfLayers &gt;= 1, &quot;The minimum number of layers is 1&quot;),
      assert(dropColors.isNotEmpty, &quot;The drop colors list cannot be empty&quot;),
      assert(distanceBetweenLayers &gt; 0,
          &quot;The distance between layers cannot be 0, try setting the number of layers to 1 instead&quot;),
      super(key: key);</code></pre>
</section>


  </div> <!-- /.main-content -->

  <div id="dartdoc-sidebar-left" class="sidebar sidebar-offcanvas-left">
    <header id="header-search-sidebar" class="hid