Question Undeclared Identifier getLightinginformation_float

Code (CSharp):

1. void GetLightingInformation_float(out float3 Direction, out float3 Color,out float Attenuation)
2. {
3.     #ifdef SHADERGRAPH_PREVIEW
4.         Direction = float3(-0.5,0.5,-0.5);
5.         Color = float3(1,1,1);
6.         Attenuation = 0.4;
7.     #else
8.         Light light = GetMainLight();
9.         Direction = light.direction;
10.         Attenuation = light.distanceAttenuation;
11.         Color = light.color;
12.     #endif
13. }

This code in an hlsl file is being loaded into my custom function but for some reason it gives me these messages now for the shader and im trying to follow this tutorial on how to create a cel shading toon shader by the youtube account gamesplusjames and im stuck at this point and idk how its gone so wrong

 

The Naming must be the same,... that helped me. Thanks