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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 process_runner(quantity=1, queue=None, backend=None):
    '''
    Process queued runners

    quantity
        number of runners to process

    queue
        queue to insert the runner reference into

    backend
        backend that to use for the queue

    CLI Example:

    .. code-block:: bash

        salt-run queue.process_runner
        salt-run queue.process_runner 5

    '''
    queue_kwargs = __get_queue_opts(queue=queue, backend=backend)
    data = process_queue(quantity=quantity, is_runner=True, **queue_kwargs)
    for job in data['items']:
        __salt__[job['fun']](*job['args'], **job['kwargs'])