1. Where can I find the APIs or any type of docs for Tizen SDK for Wearable?

For one, I want to find the IrLed API. The release note for the SDK states:

• IrLED API is supported to show a string through IrLED

I searched on this site but couldnt find one.

2. I really want to know what showing a string through the IrLED. Can anyone help?