vuetify data table expanded icon example

1<v-data-table
2  :headers="headers"
3  :items="desserts"
4  :expanded="expanded"
5  item-key="name"
6  show-expand
7  class="elevation-1"
8  @click:row="clicked">
9

1  clicked (value) {
2    const index = this.expanded.indexOf(value)
3    if (index === -1) {
4      this.expanded.push(value)
5    } else {
6      this.expanded.splice(index, 1)
7    }
8  },
9