@property
def main(self):
    '\n        :obj:`ipywidgets.VBox`: A box containing all widgets forming the application.\n        '
    if (self._main is None):
        self._main = VBox([self.project_panel, HBox([VBox([Label('Input options:'), self.data_panel, self.contours, self.window_selection]), VBox([Label('Save as:'), self.export_as, self.z_value, self.output_panel], layout=Layout(width='50%'))]), self.selection])
    return self._main
:obj:`ipywidgets.VBox`: A box containing all widgets forming the application.
@property
def main(self):
    '\n        \n        '
    if (self._main is None):
        self._main = VBox([self.project_panel, HBox([VBox([Label('Input options:'), self.data_panel, self.contours, self.window_selection]), VBox([Label('Save as:'), self.export_as, self.z_value, self.output_panel], layout=Layout(width='50%'))]), self.selection])
    return self._main