'Flag media player features that are supported.'

@property
def supported_features(self):

    if self._coordinator:
        return self._coordinator.supported_features
    supported = SUPPORT_SONOS
    if (not self._support_previous_track):
        supported = (supported ^ SUPPORT_PREVIOUS_TRACK)
    if (not self._support_next_track):
        supported = (supported ^ SUPPORT_NEXT_TRACK)
    if (not self._support_play):
        supported = (supported ^ SUPPORT_PLAY)
    if (not self._support_stop):
        supported = (supported ^ SUPPORT_STOP)
    if (not self._support_pause):
        supported = (supported ^ SUPPORT_PAUSE)
    return supported
