code: public void setTimewarpInt(String timewarp) {
  
          try {
              m_userSettings.setTimeWarp(Long.valueOf(timewarp).longValue());
          } catch (Exception e) {
              m_userSettings.setTimeWarp(-1);
          }
      }
docs: Sets the timewarp setting from a numeric string
  
  @param timewarp a numeric string containing the number of milliseconds since the epoch