checkNewTreeElements(fTreeContentProvider.getElements(fRoot));
checkNewTreeElements(getTreeChildren(fRoot));
	public void aboutToOpen() {		determineWhiteCheckedDescendents(fRoot);		checkNewTreeElements(fTreeContentProvider.getElements(fRoot));		fCurrentTreeSelection= null;		//select the first element in the list		Object[] elements= fTreeContentProvider.getElements(fRoot);		Object primary= elements.length > 0 ? elements[0] : null;		if (primary != null) {			fTreeViewer.setSelection(new StructuredSelection(primary));		}		fTreeViewer.getControl().setFocus();	}