abled</option>
        <option><img src="theme:v-trackbar-thumb-normal">theme:v-trackbar-thumb-normal</option>
        <option><img src="theme:v-trackbar-thumb-hover">theme:v-trackbar-thumb-hover</option>
        <option><img src="theme:v-trackbar-thumb-pressed">theme:v-trackbar-thumb-pressed</option>
        <option><img src="theme:v-trackbar-thumb-focus">theme:v-trackbar-thumb-focus</option>
        <option><img src="theme:v-trackbar-thumb-disabled">theme:v-trackbar-thumb-disabled</option>
        <option