src/main/resources/icons/gutter.svg

<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12">
  <g fill="none" fill-rule="evenodd">
    <path fill="#6E6E6E" d="M10,9 L12,9 L9.5,12 L7,9 L9,9 L9,0 L10,0 L10,9 Z"/>

    <g fill="#6E6E6E" fill-opacity=".7">
      <rect width="6" height="1" x="2" y="3"/>
      <rect width="4" height="1" x="2" y="7"/>
      <rect width="3" height="1" x="2" y="5"/>
    </g>
  </g>
</svg>