public static EditableGrouping <K, T> ToEditableGrouping <K, T>(this IEnumerable <T> source, K key) { var res = new EditableGrouping <K, T>(key, source); return(res); }
public static EditableGrouping <K, T> ToEditableGrouping <K, T>(this IGrouping <K, T> source) { var res = new EditableGrouping <K, T>(source.Key, source); return(res); }