anthology-post-figure-2.scss

$margin-right-adjectives: (
    "small": 1rem,
    "medium": 1.5rem,
    "large": 2rem,
);

// A(define, ...) is a mixin provided by Anthology

@include A(define,
  "marginRight",            // The namespace of our rule
  margin-right,             // The CSS property we are targeting
  $margin-right-adjectives  // The "adjectives" for this rule
);