human
I wrote the below code

    from pyjoin import ring_device, set_wallpaper, send_sms, send_file, send_url, send_notification
    def ring_service(service):
        'Service    to    ring    devices.'
        ring_device(api_key=api_key, device_id=device_id, device_ids=device_ids, device_names=device_names)
    def set_wallpaper_service(service):
        'Service    to    set    wallpaper    on    devices.'
        set_wallpaper(api_key=api_key, device_id=device_id, device_ids=device_ids, device_names=device_names, url=service.data.get('url'))
    def send_file_service(service):
        'Service    to    send    files    to    devices.'
        send_file(api_key=api_key, device_id=device_id, device_ids=device_ids, device_names=device_names, url=service.data.get('url'))
    def send_url_service(service):
        'Service    to    open    url    on    devices.'
        send_url(api_key=api_key, device_id=device_id, device_ids=device_ids, device_names=device_names, url=service.data.get('url'))
    def send_tasker_service(service):
        'Service    to    open    url    on    devices.'
        send_notification(api_key=api_key, device_id=device_id, device_ids=device_ids, device_names=device_names, text=service.data.get('command'))
    def send_sms_service(service):
        'Service    to    send    sms    from    devices.'
        send_sms(device_id=device_id, device_ids=device_ids, device_names=device_names, sms_number=service.data.get('number'), sms_text=service.data.get('message'), api_key=api_key)
    hass.services.register(DOMAIN, (name + 'ring'), ring_service)
    hass.services.register(DOMAIN, (name + 'set_wallpaper'), set_wallpaper_service)
    hass.services.register(DOMAIN, (name + 'send_sms'), send_sms_service)
    hass.services.register(DOMAIN, (name + 'send_file'), send_file_service)
    hass.services.register(DOMAIN, (name + 'send_url'), send_url_service)
    hass.services.register(DOMAIN, (name + 'send_tasker'), send_tasker_service)

What's a good function header?
 ... Here's a good function header?
assistant
#Here's a good function header.

def register_device(hass, api_key, name, device_id, device_ids, device_names):