Vuetify: How to check if a row is expanded from slot?

How to check if a <v-data-table> row is expanded from a slot ?

<v-data-table ...>
  <template v-slot:item.client="{ item, expand, isExpanded }">
    <b>
      {{ item.client }}
      {{ isExpanded ? 'yes' : 'no' }}
    </b>
  </template>
</v-data-table>