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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 get_service():
 """Load the configured service."""

    global _SERVICE_MANAGER

    if _SERVICE_MANAGER is None:
        _SERVICE_MANAGER = driver.DriverManager(
            namespace='tvrenamer.data.services',
            name=cfg.CONF.lookup_service,
            invoke_on_load=True)
    return _SERVICE_MANAGER.driver