I'm really confused by ":item-class" prop in Vuetify (v. 2.3.4) data table. It does nothing even if I try to add a static text class.

<v-data-table class="mt-10"

                      item-key="id"

                      :headers="headers"

                      :items="user_tender_assignment_table.user_tender_assignments"

                      :loading="user_tender_assignment_table.loading"

                      :loading-text="tables.loading_text"

                      :search="user_tender_assignment_table.search"

                      v-model="user_tender_assignment_table.selected"

                      :footer-props="tables.footer_props"

                      :item-class="'xxx'"

</v-data-table>

It just renders tr tags without any class:

Do you know why? I think it worked some time ago and I haven't changed Vuetify (2) version.