item -- a pointer to the item from the model for which to create a widget for
result -- a gtk:widget object that represents item

Called for list boxes that are bound to a g:list-model object with the gtk:list-box-bind-model function for each item that gets added to the model.

Versions of GTK prior to 3.18 called the gtk:widget-show-all function on the rows created by the gtk:list-box-create-widget-func callback function, but this forced all widgets inside the row to be shown, and is no longer the case. Applications should be updated to show the desired row widgets.