def setundobuffer(self, size):
        if size is None:
            self.undobuffer = None
        else:
            self.undobuffer = Tbuffer(size)
If the mountpoint is unusable, for example because it is a regular file
dataset/ETHPy150Open amrdraz/kodr/app/brython/www/src/Lib/site-packages/turtle.py/RawTurtle.setundobuffer--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/test/test_blockdevice.py/MountBlockDeviceTests.test_mountpoint_error