How to disable columns in Susy Grid system?

Question

I want to disable columns with Susy, for example, disable columns in Bootstrap.

I tried to use

@include span(4 at 4); 

But that does not work. What am I doing wrong?

Answer 1

I just found out how to do this.

There are two functions (or mixes) called push and pull

 @include push(4); @include pull(4); 

And indeed it is:)