Question Tex2D in a Custom Node not working?

I have a custom node that needs to get Tex2D, but it errors every time. Is there a way to get a tex2D properly? I cant figure out what I am doing wrong or find any documentation or example of someone else who has done it right.

The code inside of the custom node is:

surfaceHeight = Tex2D(ParallaxMap, uv + uvOffset);

That line errors if I compile though, removing it all works 100% right, but I need that line.

If I know what the Tex2D is, could I input that texture into the node via an in node link? How would I re-write that line in that case?

 

i'm struggling too with outputting texture2ds in my custom function did you have any luck yet?
here is my post: https://forum.unity.com/threads/custom-function-help.706259/
doesn't seem like shadergraph is well documented cause nobody knows an answer

 

use this:
SAMPLE_TEXTURE2D(texture, SamplerState, UV)

*SamplerState node is exist