//// case where behavior is responsive, or with a marker class
//@mixin media-breakpoint-down-or($breakpoint, $name) {
//  #{unquote($name)} {
//    @content
//  }
//
//  @include media-breakpoint-down($breakpoint) {
//    @content
//  }
//}
//
//// case where behavior is responsive, or with a marker class
//@mixin media-breakpoint-up-or($breakpoint, $name) {
//  #{unquote($name)} {
//    @content
//  }
//
//  @include media-breakpoint-up($breakpoint) {
//    @content
//  }
//}
//
//// Name of the previous breakpoint, or null
////
////    >> breakpoint-next(sm)
////    xs
////    >> breakpoint-next(sm, (xs: 0, sm: 544px, md: 768px))
////    xs
////    >> breakpoint-next(sm, $breakpoint-names: (xs sm md))
////    xs
//@function breakpoint-previous($name, $breakpoints: $grid-breakpoints, $breakpoint-names: map-keys($breakpoints)) {
//  $n: index($breakpoint-names, $name);
//  @return if($n > 1, nth($breakpoint-names, $n - 1), null);
//}