group of widgets in picture module

in my application i want to create multiple widgets of similar type. from
docs i found that, by using picture module i can create such widgets and use
them repeatedly. but when i tried to use picture module, i was successful in
using individual widgets but it was not doing anything if i group the
widgets and try to copy the group instead of doing one widget at a time.

does picture modules support ptgroup? or i am missing some link.

can anybody guide me in this matter?

thanks in advance