def __init__(self):
    self._central_widget = None
    self._import_multiple_stages_btn = None
    self._import_root_btn = None
    self._imported_stages_list = None
    self._imported_stages_label = None
    self._replace_queue_list = None
    self._stages_to_be_replaced_label = None
    self._replace_btn = None
    self._add_to_replace_btn = None
    self._remove_from_replace_btn = None
    self._progress_bar = None
    self._line = None
    self._add_single_stage_btn = None
    self._remove_single_stage_btn = None
    self._status_bar = None
def __init__(self):
    self._central_widget = None
    self._import_multiple_stages_btn = None
    self._import_root_btn = None
    self._imported_stages_list = None
    self._imported_stages_label = None
    self._replace_queue_list = None
    self._stages_to_be_replaced_label = None
    self._replace_btn = None
    self._add_to_replace_btn = None
    self._remove_from_replace_btn = None
    self._progress_bar = None
    self._line = None
    self._add_single_stage_btn = None
    self._remove_single_stage_btn = None
    self._status_bar = None