Bug 96917 [implementation] If two editors use the 2.x-compatible API, one or both doesn't work
At least one problem is that 3.0 installs partitioners for every editor that might possibly edit a file, but each editor expects its own partitioner to be installed. Leading to the famous white screen with blue line.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/PartiallySynchronizedDocument.java
}
	
	/*
	 * @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();
        }
    }
	
	/*
	 * @see IDocument#get(int, int)