Telerik.Web.Mvc.Infrastructure.Group.InitializeSubgroups C# (CSharp) Method

        private void InitializeSubgroups()
        {
            List<IGroup> subgroupsList = new List<IGroup>();

            if (this.HasSubgroups)
            {
                subgroupsList.AddRange(this.Items.OfType<IGroup>());
            }

            this.subgroups = new ReadOnlyCollection<IGroup>(subgroupsList);
        }