// Outputs line-height

@mixin u-line-height($value…) {

$value: unpack($value);
$important: null;
@if has-important($value) {
  $value: remove($value, "!important");
  $important: " !important";
}
$family: nth($value, 1);
$scale: nth($value, 2);
line-height: lh($family, $scale) #{$important};

}