* @see org.apache.poi.ss.usermodel.CellStyle#BORDER_MEDIUM_DASH_DOT_DOT
* @see org.apache.poi.ss.usermodel.CellStyle#BORDER_SLANTED_DASH_DOT
*/
public void setBorderTop(short border) {
CTBorder ct = getCTBorder();
CTBorderPr pr = ct.isSetTop() ? ct.getTop() : ct.addNewTop();
if(border == BORDER_NONE) ct.unsetTop();
else pr.setStyle(STBorderStyle.Enum.forInt(border + 1));
int idx = _stylesSource.putBorder(new XSSFCellBorder(ct, _theme));
_cellXf.setBorderId(idx);
_cellXf.setApplyBorder(true);