code: function selectorClassNameSpy(results, className) {
          var context = phantomas.getDOMPath(this);
  
          phantomas.incrMetric('DOMqueriesByClassName');
          phantomas.addOffender('DOMqueriesByClassName', {class: className, node: context});
          querySpy('class', '.' + className, 'getElementsByClassName', context, (results.length === 0));
      }
docs: selectors by class name