.col#{$infix}-#{$i} {\n @extend %grid-column;\n }\n }\n }\n\n .col#{$infix},\n .col#{$infix}-auto {\n @extend %grid-column;\n }\n\n @include media-breakpoint-up($breakpoint, $breakpoints) {\n // Provide basic `.col-{bp}` classes for equal-width flexbox columns\n .col#{$infix} {\n flex-basis: 0;\n flex-grow: 1;\n max-width: 100%;\n }\n\n @if $grid-row-columns > 0 {\n @for $i from 1 through $grid-row-columns {\n...