code: public void clear() {
  
          if (m_handlerRegistration != null) {
              m_handlerRegistration.removeHandler();
              m_handlerRegistration = null;
          }
          m_validationContext = null;
          m_paused = false;
          m_validating = false;
          if (m_validationTimer != null) {
              m_validationTimer.cancel();
              m_validationTimer = null;
          }
      }
docs: Destroys the current handler instance.<p>