docs: function (buttonState) {
              var scenarios = document.querySelectorAll('.scenario'),
                  hasClass,
                  self = this;
              for (var i = 0; i < scenarios.length; i++) {
                  hasClass = scenarios[i].classList.contains(buttonState);
                  if (hasClass === true) {
                      if (scenarios[i].parentNode.style.display === 'none') {
                          scenarios[i].parentNode.style.display = 'block';
                      }
                  } else {
                      scenarios[i].parentNode.style.display = 'none';
                  }
              }
  
              if (buttonState === 'failed') {
                  self.currentView = 'failed';
                  this.hideFeatureContainer('passed');
              } else {
                  self.currentView = 'passed';
                  this.hideFeatureContainer('failed');
              }
          }