code: function svgUrl(name, collection) {
    for (var i = 0, result; i < COLLECTION_FILTERS.length; i++) {
      if (COLLECTION_FILTERS[i][0].test(collection)) {
        result = COLLECTION_FILTERS[i][1];
        collection = _.isFunction(result)? result(collection) : result;
        break;
      }
    }
    return 'https://raw.github.com/fontello/' + collection +
           '/master/src/svg/' + name + '.svg';
  }
docs: Returns the URL of a Fontello SVG