'Set or get the status for propagation of geometry information.
A boolean argument specifies whether the geometry information
of the slaves will determine the size of this widget. If no argument
is given, the current setting will be returned.'

def grid_propagate(self, flag=_noarg_):

    if (flag is Misc._noarg_):
        return self._getboolean(self.tk.call('grid', 'propagate', self._w))
    else:
        self.tk.call('grid', 'propagate', self._w, flag)
