def _on_undo ( self, info ):
        if info.ui.history is not None:
            info.ui.history.undo()

    #---------------------------------------------------------------------------
    #  Handles a 'Redo' change request:
    #---------------------------------------------------------------------------
Initialize SMOS soil moisture object.
dataset/ETHPy150Open enthought/traitsui/traitsui/handler.py/Handler._on_undo--crossover with--dataset/ETHPy150Open nasa/RHEAS/src/datasets/smos.py/Smos.__init__