builder.addReplace("rename parameter " + oldName + " to: " + newName, occurrenceOffset, length, newName);
builder.addReplace("update parameter reference", occurrenceOffset, length, newName);
	private void addParameterRenameChange(int parameterIndex, int occurrenceOffset, ITextBufferChange builder){		int length= fOldParameterNames[parameterIndex].length();		String newName= fNewParameterNames[parameterIndex];		String oldName= fOldParameterNames[parameterIndex];		builder.addReplace("rename parameter " + oldName + " to: " + newName, occurrenceOffset, length, newName);	}