docs: @Override
    public boolean getBooleanCellValue() {
      CellType cellType = getCellType();
      switch(cellType) {
        case BLANK:
          return false;
        case BOOLEAN:
          return rawContents != null && TRUE_AS_STRING.equals(rawContents);
        case FORMULA:
          throw new NotSupportedException();
        default:
          throw typeMismatch(CellType.BOOLEAN, cellType, false);
      }
    }