Bug 91955 API Request: Add modification stamp to document and document event
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/PartiallySynchronizedDocument.java
fLockObject= lockObject;
    }
    /*
     * @see org.eclipse.jface.text.ISynchronizable#getLockObject()
     */
    public Object getLockObject() {
        return fLockObject == null ? fInternalLockObject : fLockObject;
    }
	/*
	 * @see IDocumentExtension#startSequentialRewrite(boolean)
	 */
	public void startSequentialRewrite(boolean normalized) {
	    synchronized (getLockObject()) {
	        super.startSequentialRewrite(normalized);
	    }
	}
	/*
	 * @see IDocumentExtension#stopSequentialRewrite()
	 */
	public void stopSequentialRewrite() {
		synchronized (getLockObject()) {
            super.stopSequentialRewrite();
        }
    }
	/*
	 * @see IDocument#get()
	 */
	public String get() {
		synchronized (getLockObject()) {
            return super.get();