this.keyboardHandler.close();
keyboardHandler.close();
	private final synchronized int decRefCount(boolean forceClose) {		refCount--;		log.debug("refCount.dec=" + refCount);		if ((refCount == 0) || forceClose) {			onClose();			if (keyboardHandler != null) {				this.keyboardHandler.close();			}			if (mouseHandler != null) {				this.mouseHandler.close();			}			if (graphics != null) {				this.graphics.close();			}			this.api = null;			this.graphics = null;			this.keyboardHandler = null;			this.mouseHandler = null;			this.refCount = 0;			notifyAll();		}		return refCount;	}