def wait(self):
        if self._returncode is not None:
            return
        self._returncode, self._stdout, self._stderr = run_proc(self.proc,
            self._expected_retcode, self._timeout)
Waits for the process to terminate; will raise a
dataset/ETHPy150Open tomerfiliba/plumbum/plumbum/commands/modifiers.py/Future.wait