code: function _expandRowMergedRange(tableData, tableRange, rangeType) {
    const {rowIndex} = tableRange[rangeType];
    const rowData = tableData[rowIndex];
  
    util.range(tableRange.start.colIndex, tableRange.end.colIndex + 1).forEach(colIndex => {
      const cellData = rowData[colIndex];
      const {rowMergeWith} = cellData;
      let lastRowMergedIndex = -1;
  
      if (util.isExisty(rowMergeWith)) {
        if (rowMergeWith < tableRange.start.rowIndex) {
          tableRange.start.rowIndex = rowMergeWith;
        }
  
        lastRowMergedIndex = rowMergeWith + tableData[rowMergeWith][colIndex].rowspan - 1;
      } else if (cellData.rowspan > 1) {
        lastRowMergedIndex = rowIndex + cellData.rowspan - 1;
      }
  
      if (lastRowMergedIndex > tableRange.end.rowIndex) {
        tableRange.end.rowIndex = lastRowMergedIndex;
      }
    });
  }
docs: Expand table range by row merge properties like rowspan, rowMergeWith.
  @param {Array.<Array.<object>>} tableData - table data
  @param {{
  start: {rowIndex: number, colIndex: number},
  end: {rowIndex: number, colIndex: number}
  }} tableRange - table range
  @param {string} rangeType - range type like start, end
  @private