code: public void startStep(String translationKey, String message, Object... arguments)
      {
          this.progress.startStep(this, new Message(translationKey, message, arguments));
      }
docs: Close current step if any and move to next one.
  
  @param translationKey the key used to find the translation of the step message
  @param message the default message associated to the step
  @param arguments the arguments to insert in the step message