//
// A mixin for generating a rule.
//
@mixin test-mixin {

  //
  // A function to help with something.
  //
  // @param {int} $a
  //   The $a.
  // @param {int} $b
  //   The $b
  //
  // @return {bool}
  //   true if $a is greater than $b, false otherwise.
  //
  @function greater($a, $b) {
    // Check if a is greater than b
    @return $a > $b;
  }

  .one-liner { color: red; // Sets the color
border: 1px; // Add a border
}

  // Do some logic based on the function call.
  @if (greater(2, 2)) {
    // all good here.
  }
  @else { // Never gets called
    // If we get here, warn somebody
    @warn "how'd I get here?";
  }

}