arraySpanMethod(obj) {...}

let a = 1
if (obj.rowIndex === 3 && obj.columnIndex > 0) { // 當為第四行且不為第一列
    if (obj.columnIndex === 1) { // 設定第四行第二列單元格的跨列數
        a = this.theadGroupUuid.length + 1
    } else {
        a = 0
    }
}
return [1, a]
 

if (rowIndex % 2 === 0) {
          if (columnIndex === 0) {
            return [1, 2];
          } else if (columnIndex === 1) {
            return [0, 0];
          }
        }

if (columnIndex === 0) {
          if (rowIndex % 2 === 0) {
            return {
              rowspan: 2,
              colspan: 1
            };
          } else {
            return {
              rowspan: 0,
              colspan: 0
            };
          }
        }