docs: function () {
              var steps = this.querySelectorAll('.step');
              var scenarioArrow = this.querySelector('.scenario-arrow');
  
              for (var k = 0; k < steps.length; k++) {
                  if (steps[k].style.display === 'block') {
                      scenarioArrow.classList.remove('fa-angle-up');
                      scenarioArrow.classList.add('fa-angle-down');
                      steps[k].style.display = 'none';
                  } else {
                      steps[k].style.display = 'block';
                      scenarioArrow.classList.remove('fa-angle-down');
                      scenarioArrow.classList.add('fa-angle-up');
                  }
              }
          }