final Holder<Exception> exceptionHolder=new Holder<Exception>();
Holder<Integer> rowIndex = new Holder<Integer>(0); Holder<Row> rowHolder = new Holder<Row>(sheet.createRow(rowNumber)); Holder<Integer> colIndex = new Holder<Integer>(0); if (item instanceof Vertex) { addCell(wb, headerRow, "id", colIndex, boldStyle); Holder<Integer> colIndex = new Holder<Integer>(0); if (item instanceof Vertex) { Vertex vertex = (Vertex) item;