使用NPOI从一个单元格复制超链接到另一个单元格

I am trying to copy certain data from a sheet to another, but some cells are simple strings and some are hyperlinks. If I use StringCellValue on the strings one it's ok, but I haven't found a method to copy the hyperlinks from the original sheet into the new one that I am constructing. I am trying to copy certain data from a sheet t