How to use the mirakuru.base.Executor.start function in mirakuru

def start(self):
        """
        Start executor with additional checks.

        Checks if previous executor isn't running then start process
        (executor) and wait until it's started.
        """
        if self.pre_start_check():
            # Executor or other process is running with same config.
            raise AlreadyRunning(self)

        Executor.start(self)
        self.wait_for(self.after_start_check)