devdocs/assets/stylesheets/pages/_groovy.scss

._groovy {
  padding-left: 1rem;

  h1, h2 { margin-left: -1rem; }
  h2 { @extend %block-heading; }
  h3 { @extend %block-label; }

  .constructor { @extend %label-blue; }
  .method { @extend %label-blue; }
  .element { @extend %label-green; }
  .field { @extend %label-green; }
  .enum_constant { @extend %label-orange; }
}