goToPreviousStep method
      
void
goToPreviousStep()
      
     
    
Jump to the previous step
Implementation
void goToPreviousStep() {
  if (isFirstStep) {
    return;
  }
  _journeyHelper.goToStep(currentStep - 1);
}
Jump to the previous step
void goToPreviousStep() {
  if (isFirstStep) {
    return;
  }
  _journeyHelper.goToStep(currentStep - 1);
}