Empty node to split shader interface into sections

Making my first fairly complicated shader with a lot of inputs, I pondered the opportunity for an empty node that I could use simply to make a sort of headline in the main shader interface. So for instance, I'd call it "NORMALS -----------------------------" and then underneath I'd have the inputs for Detail Normals, Main Normals, Overlay Normals and so forth. It would serve no other function than giving me a way to split my shader into categories for when the shader is actually being used.