Get name instead of value

How do I get "Up" ie. the name instead of the vector2 value?

I'm using ctx.ReadValue<Vector2>() to get the vector2, but I just want to know if it's up/down, rather than the actual value.

Code (CSharp):

1. myAction.AddCompositeBinding("2DVector") // Or "Dpad"
2.     .With("Up", "<Keyboard>/w")
3.     .With("Down", "<Keyboard>/s")
4.     .With("Left", "<Keyboard>/a")
5.     .With("Right", "<Keyboard>/d");