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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 list_domain_cache():
    '''
    List domains that have been cached

    CLI Example:

    .. code-block:: bash

        salt-run venafi.list_domain_cache
    '''
    cache = salt.cache.Cache(__opts__, syspaths.CACHE_DIR)
    return cache.list('venafi/domains')