Single Responsibility with LESS

create-icon.less

.setSize(@w, @h){
  width: @w;
  height: @h;
}
.iconSize(@size){
  .setSize(@size);
}
.iconCreate(@background, @position: left, @size: 16px){
  background-image: @background;
  background-repeat: no-repeat;
  background-position: top center;
  display: inline-block;
  float: @position;
  .iconSize(@size);
}