text: 'use strict';
  
  var sass = require('node-sass');
  
  module.exports = {
      'headings($from: 0, $to: 6)': function (from, to) {
          var f = from.getValue();
          var t = to.getValue();
          var list = new sass.types.List(t - f + 1);
          var i;
  
          for (i = f; i <= t; i++) {
              list.setValue(i - f, new sass.types.String('h' + i));
          }
  
          return list;
      }
  };
  