ListBoxCreateWidgetFunc
Called for list boxes that are bound to a GListModel
with gtk_list_box_bind_model() for each item that gets added to the model.
If the widget returned is not a #GtkListBoxRow widget, then the widget will be inserted as the child of an intermediate #GtkListBoxRow.
param
item
the item from the model for which to create a widget forreturn a
GtkWidget
that represents @item