How to use the @build-tracker/comparator.CellType.TEXT function in @build-tracker/comparator

const mapHeaderCell = (cell, i): React.ReactElement | void => {
    switch (cell.type) {
      case CellType.TEXT:
        return ;
      case CellType.REVISION:
        return (
          
        );
      case CellType.REVISION_DELTA:
        return (

.map((cell, i) =>
                    this._renderTotalCell(
                      cell,
                      i,
                      2,
                      cell.type === CellType.TEXT ? 'Selected Sum' : undefined,
                      styles.lastStickyHeader
                    )
                  )}