void ReloadItems(NSOutlineView outlineView, IReactiveList <T> _items, Func <T, string> groupBy, Func <T, string> iconExtractor, Func <T, string> titleExtractor)
{
this.items = _items
.GroupBy(groupBy)
.Select(group => {
var children = group.Select(item => new GenericOutlineItemWrapper(iconExtractor(item), titleExtractor(item))).ToList();
return(new GenericOutlineItemWrapper("", group.Key, children, true));
})
.ToList();
outlineView.ReloadData();
}
