directive.md

<div class="legend">
  <div class="legend-title">Legend</div>
  <div class="items"></div>
</div>
<div class="controls">
  <div class="control-group">
    <label for="metric-select-<id>">Metric</label>
    <select id="metric-select-<id>"></select>
  </div>
</div>