code: @Deprecated
      private void onStepProgress(Object source)
      {
          onStartStepProgress(null, source);
  
          // if there is only one step close it and move to the next one
          if (this.currentStep.getParent().getChildren().size() == 1) {
              this.currentStep = this.currentStep.getParent().nextStep(null, source);
          }
      }
docs: Move progress to next step.
  
  @deprecated since 7.1M2, use {@link #onStartStepProgress(Message)} instead