Make Normals Editable in Geometry Nodes

It would be great to be able to edit normals in Geometry Nodes. At the very least, there should be a way to achieve the functionality of the Normal Edit modifier.

For one thing, the Normal Edit modifier is a common technique for more seamlessly blending environment assets with the ground, but additionally, good looking cards for trees/bushes in professional games often use bent normals (see the following article from polycount on this: wiki.polycount.com/wiki/Foliage )

In the image, look at the two middle rows for the difference between using bent normals and not.

This bent normals method is currently possible with the Normal Edit modifier or just manually using the various normals tools in the Mesh > Normals menu, but it is not possible within Geometry Nodes, since the Normal attribute does not appear to be writable.