It would often be good to be able to refresh a "panel" or ref attribute (ie grid) on a form BUT not the whole form. Say you add something to the ref attribute, or you do something that applies rule to change a style etc. But you don't want the whole form to refresh/update.
Why?
Often the form has many elements that take a while to execute and re-display and thus refreshing the whole form slows the user down.
For long forms the user has to scroll back down to the lower parts of the form again, this is an annoying UI for the user. If the ref attribute just updated not need for screen to refresh and scroll again.
