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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def run_in_executor(f):
 """ A decorator to run the given method in the ThreadPoolExecutor. """


    @wraps(f)
    def new_f(self, *args, **kwargs):

        if self.is_shutdown:
            return
        try:
            future = self.executor.submit(f, self, *args, **kwargs)
            future.add_done_callback(_future_completed)
        except Exception:
            log.exception("Failed to submit task to executor")

    return new_f