code: @Override
      public void prepare( CssFormatter formatter ) {
          List<Rule> rules = mixins.get( name );
          if( rules != null ) {
              for( int i = 0; i < rules.size(); i++ ) {
                  Rule rule = rules.get( i );
                  mixins.addAll( rule.getMixins() );
              }
          }
  
      }
docs: {@inheritDoc}