Can't access Depth of Field?

I have DepthOfFieldScatter attached to my camera.
Created a script called which I want to alter the DepthOfFieldScatter at runtime, however I can’t find the DepthOfFieldScatter object.

I’m using C#, and when I type:

public DepthOfFieldScatter, nothing comes up. The only thing that appears is the suggestion of DepthTextureMode.

How can I access it?

This post should help:

Actually, this answer shows a workaround that works perfectly: