code: public ANRWatchDog setInterruptionListener(InterruptionListener listener) {
          if (listener == null) {
              _interruptionListener = DEFAULT_INTERRUPTION_LISTENER;
          } else {
              _interruptionListener = listener;
          }
          return this;
      }
docs: Sets an interface for when the watchdog thread is interrupted.
  If not set, the default behavior is to just log the interruption message.
  
  @param listener The new listener or null.
  @return itself for chaining.