@param window the window to query
@param atom the Atom to request
@param nitems the number of items
@param type the type of the return
@param size the size of the type
@return data consisting of 'nitems' items of size 'size' and type 'type'
will need to be cast to the type before using.
Generic property fetch.
@param window the window to query @param atom the Atom to request @param nitems the number of items @param type the type of the return @param size the size of the type @return data consisting of 'nitems' items of size 'size' and type 'type' will need to be cast to the type before using.