How do I change the Mip Bias of a Sprite Atlas?

Is it possible to change the Mip Bias of a Sprite Atlas?

I can change the Mip Bias of Sprites via Script or DeveloperMode. Unfortunately I can not find a way to do the same for the built-in Sprite Atlas.

You can get the texture from a Sprite that uses it. In play mode, the sprite’s texture will point to the texture atlas and you can change its mipmap bias from there using code.
I don’t (yet?) know of a different way.