def flush(self):
        raise NotImplementedError, 'PushbackFile is read-only'
:param path: Path to set
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/grizzled/grizzled/io/__init__.py/PushbackFile.flush--crossover with--dataset/ETHPy150Open dcos/dcos-cli/dcos/config.py/MutableToml.__setitem__