gtk:selection-model-selection-in-range (model pos nitems)

model -- a gtk:selection-model object
pos -- an unsigned integer for the start of the queried range
nitems -- an unsigned integer for the number of items in the queried range

The gtk:bitset instance that matches the selection state for the given state with all other values being undefined. The bitset must not be modified.

Gets a bitset containing a set where the values in the range [pos, pos + nitems) match the selected state of the items in that range. All values outside that range are undefined.

This function is an optimization for the gtk:selection-model-selection function when you are only interested in part of the model's selected state. A common use case is in response to the "selection-changed" signal.