old_contents: """Constants of services that can be discovered."""
  
  BELKIN_WEMO = "belkin_wemo"
  DLNA = "DLNA"
  GOOGLE_CAST = "google_cast"
  PHILIPS_HUE = "philips_hue"
  PMS = 'plex_mediaserver'
  LMS = 'logitech_mediaserver'
  NETGEAR_ROUTER = "netgear_router"
  SONOS = "sonos"
  PANASONIC_VIERA = "panasonic_viera"
  SABNZBD = 'sabnzbd'
  KODI = 'kodi'
  
new_contents: """Constants of services that can be discovered."""
  
  BELKIN_WEMO = "belkin_wemo"
  DLNA = "DLNA"
  GOOGLE_CAST = "google_cast"
  PHILIPS_HUE = "philips_hue"
  PMS = 'plex_mediaserver'
  LMS = 'logitech_mediaserver'
  NETGEAR_ROUTER = "netgear_router"
  SONOS = "sonos"
  PANASONIC_VIERA = "panasonic_viera"
  SABNZBD = 'sabnzbd'
  KODI = 'kodi'
  MYSTROM = 'mystrom'
  
subject: Add mystrom