Im trying to list my items in groups of 3, however, I cant get InGroupsOf() to work - If I remove Take() and InGroupsOf, then it loops, but when i have Take and InGroupsOf, then I get an error:

@inherits umbraco.MacroEngines.DynamicNodeContext

@if (Model.Children.Where("Visible").Any())

{

    <div class="chapter-block">            

        @{

            var count = @Model.Children.Count();

        }

        @foreach (var childPage in Model.Children.Where("Visible").Take(count).InGroupsOf(3))

        {

            var child = childPage.Children.FirstOrDefault();

            if (child != null)

            {

               var url = child.Url;

               <a href="@url">

                   @childPage.chapterHeading

               </a>

            }

        }

    </div>

}