getRowData(sectionIndex: number, rowIndex: number): any {
    var sectionID = this.sectionIdentities[sectionIndex];
    var rowID = this.rowIdentities[sectionIndex][rowIndex];
    warning(
      sectionID !== undefined && rowID !== undefined,
      'rendering invalid section, row: ' + sectionIndex + ', ' + rowIndex,
    );
    return this._getRowData(this._dataBlob, sectionID, rowID);
  }
Gets the data required to render the row.