Extracting alt text from images using HWPF

[Josh . Holthaus]

Is it possible to get the alternative text for an image using HWPF? I am 
currently using POI 3.8 and have not been able to find where this is 
stored in the HWPFDocument. I would expect it to be part of 
org.apache.poi.hwpf.usermodel.Picture but there does not seem to be any 
methods to return alt text.