def _find_one_after_last_labeled_index(self):
        body_index = 0
        while self.bodies[body_index].segment_id in self.state.body_labels:
            body_index += 1
        return body_index
def _on_item_button_remove_clicked(self, button, item):
    self._locker.lock("emit_size_spin_button_value_changed")