Method GroupByArray<TItem, TKey>(Expression<Func<TProps, IEnumerable<TItem>>>, Expression<Func<TItem, TKey>>)

Group by array elements (Items[].Property).

IRedbGroupedQueryable<TKey, TItem> GroupByArray<TItem, TKey>(Expression<Func<TProps, IEnumerable<TItem>>> arraySelector, Expression<Func<TItem, TKey>> keySelector) where TItem : class, new()