def _on_redo ( self, info ):
        if info.ui.history is not None:
            info.ui.history.redo()

    #---------------------------------------------------------------------------
    #  Handles a 'Revert' all changes request:
    #---------------------------------------------------------------------------
Handles a "Redo" change request.
dataset/ETHPy150Open enthought/traitsui/traitsui/handler.py/Handler._on_redo