text: public SheetRangeEvaluator(int firstSheetIndex, int lastSheetIndex, SheetRefEvaluator[] sheetEvaluators) {if (firstSheetIndex < 0) {throw new IllegalArgumentException("Invalid firstSheetIndex: " + firstSheetIndex + ".");}if (lastSheetIndex < firstSheetIndex) {throw new IllegalArgumentException("Invalid lastSheetIndex: " + lastSheetIndex + " for firstSheetIndex: " + firstSheetIndex + ".");}_firstSheetIndex = firstSheetIndex;_lastSheetIndex = lastSheetIndex;_sheetEvaluators = sheetEvaluators.clone();}