<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def add(zpool, *vdevs, **kwargs):
    '''
    Add the specified vdev\'s to the given storage pool

    zpool : string
        Name of storage pool

    vdevs : string
        One or more devices

    force : boolean
        Forces use of device

    CLI Example:

    .. code-block:: bash

        salt '*' zpool.add myzpool /path/to/vdev1 /path/to/vdev2 [...]

    '''
    ## Configure pool
    # NOTE: initialize the defaults
    flags = []
    target = []

    # NOTE: set extra config based on kwargs
    if kwargs.get('force', False):
        flags.append('-f')

    # NOTE: append the pool name and specifications
    target.append(zpool)
    target.extend(vdevs)

    ## Update storage pool
    res = __salt__['cmd.run_all'](
        __utils__['zfs.zpool_command'](
            command='add',
            flags=flags,
            target=target,
        ),
        python_shell=False,
    )

    ret = __utils__['zfs.parse_command_result'](res, 'added')
    if ret['added']:
        ## NOTE: lookup zpool status for vdev config
        ret['vdevs'] = _clean_vdev_config(
            __salt__['zpool.status'](zpool=zpool)[zpool]['config'][zpool],
        )

    return ret