<div class="wcpt-editor-row-option" wcpt-model-key="style">
  <div class="wcpt-editor-row-option" wcpt-model-key="[id]">
    <!-- margin -->
    <!-- margin -->
    <div class="wcpt-editor-row-option">
      <label>Margin</label>
      <div class="wcpt-flex-option-container">
        <input type="text" wcpt-model-key="margin-top" placeholder="top">
        <input type="text" wcpt-model-key="margin-right" placeholder="right">
        <input type="text" wcpt-model-key="margin-bottom" placeholder="bottom">
        <input type="text" wcpt-model-key="margin-left" placeholder="left">
      </div>
    </div>

  </div>
</div>

<div class="wcpt-editor-row-option">
  <label>HTML Class</label>
  <input type="text" wcpt-model-key="html_class" />
</div>