def truncate(self, pos=None):
        self._unsupported("truncate")

    ### Flush and close ###
Test creating a Dockerfile build via an API Hook
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/_pyio.py/IOBase.truncate--crossover with--dataset/ETHPy150Open deis/deis/controller/api/tests/test_hooks.py/HookTest.test_build_hook_dockerfile