def METHOD_NAME(runtime_ini_file):
    """
    Verify the `RuntimeContext.get_service_config` method, when the configuration section does not exist.
    """
    config = Config(configuration_file=runtime_ini_file)
    context = RuntimeContext(config=config, invoker=None)
    with pytest.raises(KeyError) as ex:
        context.get_service_config("unknown")
    assert ex.match("Configuration section does not exist: config:unknown")