Less.js Loop for manipulating adjacent siblings. Defaults to add the style to all X number of siblings as specified in the call.

.testcase {
    .adjacents-content() {
    	display: inline;
	}
	.adjacents(4, ".item" );
}

Will output to

.testcase  + .item {
  display: inline;
}
.testcase  + .item + .item {
  display: inline;
}
.testcase  + .item + .item + .item {
  display: inline;
}
.testcase  + .item + .item + .item + .item {
  display: inline;
}

Alternately you can target just a specific sibling:

.testcase {
    .adjacents-content() {
        display: inline;
	}
	.adjacents(4, ".item", false );
}

Outputs

.testcase  + .item + .item + .item + .item {
  display: inline;
}