code: public boolean isActive() {
  
          if (!m_enabled) {
              return false;
          }
          long currentTime = System.currentTimeMillis();
          return ((currentTime > m_timeStart) && (currentTime < m_timeEnd));
      }
docs: Returns <code>true</code> if this message is currently active.<p>
  
  A message is active if it is enabled and
  the current time is after the message start time and before the message end time.<p>
  
  @return <code>true</code> if this message is currently active