if (sourceViewer == null)
if (sourceViewer == null || fOutlinePage == null)
	public void synchronizeOutlinePageSelection() {				ISourceViewer sourceViewer= getSourceViewer();		if (sourceViewer == null)			return;					StyledText styledText= sourceViewer.getTextWidget();		int offset= sourceViewer.getVisibleRegion().getOffset();		int caret= offset + styledText.getCaretOffset();				IJavaElement element= getElementAt(caret);		if (element instanceof ISourceReference)			fOutlinePage.select((ISourceReference) element);	}