Question is it possible to do vertex lighting in shader graph?

like this:

Code (CSharp):

1. Varrying vert(...)
2. {
3. ...
4. OUT.color=MyVertexLightingCalculation();
5. }
6.  
7. half4 frag(Varyings IN) : SV_Target
8. {
9.    return half4(IN.color, 1);
10. }