undercoat 0.12.2

Native Rust compiler for Less and Sass/SCSS — byte-compatible with lessc and dart-sass, no Node runtime
Documentation 
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// (reference): registered but not emitted; declarations are produced only when a mixin calls it
@import (reference) "imports/reference-src.less";

.a {
  .ref-mixin();
  own: 1;
}

// an unreferenced .ref-rule is not emitted