Normal Invert- group

Hy guys,
I don’t know if it just does exist, but for me it’s very usefull this simple node to invert the RGB channel in Normal mapping (execially using 3th part tools textures)

I made this. If u want download it and let me know if it’s useful or not
Link here or in the attached fle
https://gumroad.com/l/hHXAy

Invert Normal Group.blend (3.07 MB)