/path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></p> <hr> <h3 id="stack"><a href="#stack" class="header-anchor">#</a> stack</h3> <p>• <strong>stack</strong>: <code>string</code></p> <p>The ID of the group to which this dataset belongs to (when stacked, each group will be a separate stack).</p> <h4 id="defined-in-8"><a href="#defined-in-8" class="