code: @Override
    public DurationFormatterFactory setFallbackLimit(long fallbackLimit) {
      if (fallbackLimit < 0) {
        fallbackLimit = 0;
      }
      if (fallbackLimit != this.fallbackLimit) {
        this.fallbackLimit = fallbackLimit;
        reset();
      }
      return this;
    }
docs: Set a fallback limit for durations over a given limit.
  
  @param fallbackLimit the fallback limit to use, or 0 if none is desired.
  @return this BasicDurationFormatterFactory