Inverted green channel normal node for directx normals

I know its not a big deal to create a node group to solve de problem and free myself from the obligation to create a node set only to invert the normals green channel to correct most of them to te appropriate format to work in opengl, but I believe it would be nice to have it already incorporated to blender and I also believe it's nothing hard to do, I presume.

I believe not everyone is aware of the different types of normal maps an many times I even forget to correct them myself, getting strange results.

I don't know if anyone have asked for that before. If it's duplicated i would like to apologize myself in advance.

Thabk you all for your attention.