def METHOD_NAME(slot):
    # Get the row of this slot
    assert slot.subindex, f"BUG: Excpected nested slot {slot}"
    laneIndex = slot.subindex[0]
    # FIXME: For now, we update the whole row.
    #        Later, update only the columns that correspond to this dataset.
    firstIndex = self.createIndex(laneIndex, 0)
    lastIndex = self.createIndex(laneIndex, self.columnCount() - 1)
    self.dataChanged.emit(firstIndex, lastIndex)