text: from xicam.plugins.guiplugin import GUILayout
  from .motd import MOTD
  from .dataresourcebrowser import DataResourceBrowser
  from .previewwidget import PreviewWidget
  
  _defaultstage = None
  
  
  def get_default_stage():
      global _defaultstage
      if not _defaultstage:
          _defaultstage = GUILayout(center=MOTD(), left=DataResourceBrowser(), lefttop=PreviewWidget())
      return _defaultstage
  