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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 _is_default(path, dest, name):
    '''
    Check if the subvolume is the current default.
    '''
    subvol_id = __salt__['btrfs.subvolume_show'](path)[name]['subvolume id']
    def_id = __salt__['btrfs.subvolume_get_default'](dest)['id']
    return subvol_id == def_id