in src/endpoints/PlayerEndpoints.ts [44:49]
public async transferPlayback(device_ids: string[], play?: boolean) {
if (device_ids.length > 1) {
throw new Error("Although an array is accepted, only a single device_id is currently supported. Supplying more than one will return 400 Bad Request");
}
await this.putRequest('me/player', { device_ids, play });
}