def increment_stage_index(self):
    current_idx = self._stage_select_combobox.currentIndex()
    if (current_idx == (self._stage_select_combobox.count() - 1)):
        current_idx = 0
    else:
        current_idx += 1
    self._stage_select_combobox.setCurrentIndex(current_idx)
def increment_stage_index(self):
    current_idx = self._stage_select_combobox.currentIndex()
    if (current_idx == (self._stage_select_combobox.count() - 1)):
        current_idx = 0
    else:
        current_idx += 1
    self._stage_select_combobox.setCurrentIndex(current_idx)