Any documentation on NvIFROpenGL ?

From the latest driver:
Added the NVIDIA OpenGL-based Inband Frame Readback (NvIFROpenGL) libraryto the Linux driver package. This library provides a high performance, low latency interface to capture and optionally encode an individual OpenGL framebuffer. NvIFROpenGL captures pixels rendered by OpenGL only and is ideally suited to application capture and remoting.

Any doc or code samples on this ?