initialNumToRender contains section header?

[Thyiad]

Hi,

for (var idx = firstRow; idx <= lastRow; idx++) { let data = this.props.dataSource.getRowData(idx);

At here, lastRow == initialNumToRender

The dataSource rowDatas contains section header, so if there is 3 section header, it will only render 5 rows. I'm puzzled about this ~~~