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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 service_update(auth=None, **kwargs):
    '''
    Update a service

    CLI Example:

    .. code-block:: bash

        salt '*' keystoneng.service_update name=cinder type=volumev2
        salt '*' keystoneng.service_update name=cinder description='new description'
        salt '*' keystoneng.service_update name=ab4d35e269f147b3ae2d849f77f5c88f enabled=False
    '''
    cloud = get_operator_cloud(auth)
    kwargs = _clean_kwargs(**kwargs)
    return cloud.update_service(**kwargs)