antd-theme-generator/node_modules/less/test/less-bom/namespacing/namespacing-functions.less

This a script to generate color specific styles less file and which you can use to change theme dynamically in browser

.add(@a, @b) {
  @r: @a + @b;
}
.foo {
  width: .add(10px, 10px)[];
  bar: @return[];
}

@return: {
  single: val;
}