Overview of GetFirmwareVersionsForDeviceTypeAsync goes here.
Example in C#
// Returns: IEnumerable<String>
var item = await client.GetFirmwareVersionsForDeviceTypeAsync<T>(String folderId);
Example in C#
// Returns: IEnumerable<String>
var item = await client.GetFirmwareVersionsForDeviceTypeAsync(String folderId, String deviceType);