if (cu.isWorkingCopy()) { cu= (ICompilationUnit)cu.getOriginalElement(); }
	private ITextBufferChange getTextBufferChange(ICompilationUnit cu) throws JavaModelException{		if (! fMap.containsKey(cu))			fMap.put(cu, fChangeCreator.create(cu.getElementName(), cu));		return (ITextBufferChange)fMap.get(cu);	}