Hello, does anyone happen to know the easiest way to modify the library to

Hello, does anyone happen to know the easiest way to modify the library to work with a specific 3-wire RGBW LED (SK6812 RGBW)? I have one working as an RGB right now (configured as WS2812 in the library), but would be nice to get the white working. Thanks!

This is a small lib I wrote for RGBW https://github.com/leonyuhanov/SK6812viaSPI/tree/master/SK6812_RGBW_SPI its not fastLED compatible but it works