Untitled

      <template v-slot:['item.checkbox']="{ item }">
        <v-checkbox v-model="item.selected" color="primary"></v-checkbox>
      </template>

      <template v-slot:[`item.dia_vencimento`]="{ item }">
        <v-text-field v-model="item.dia_vencimento" solo dense hide-details></v-text-field>
      </template>