[kh_hk]

Then, in Bootstrap terms and since the grid syntax is offered in mixins, should it be used as follows

    .foo-class {
        &:extend(.col-md-4, .col-md-offset-8)
    }

instead of using the mixin?

    .foo-class {
        make-md-column(4);
        make-md-column-offset(8);
    }