.submixin(@a) {

border-width: @a;

} .mixin (9) {

border: 9 !important;

} .mixin (@a: 0) {

border: @a;
boxer: @a;
.inner {
  test: @a;
}
// comment
.submixin(@a);

}

.class {

.mixin(1);
.mixin(2) !important;
.mixin(3);
.mixin(4) !important;
.mixin(5);
.mixin !important;
.mixin(9);

}