Hi, does anyone know if it's possible to render a grid property in a Multinode Tree Picker? I'm trying to do it within a partial view.

Umbraco 8.9.2

I get this error:'System.Web.HtmlString' does not contain a definition for 'sections'

Partial view:

@inherits Umbraco.Web.Mvc.UmbracoViewPage
@using ContentModels = Umbraco.Web.PublishedModels;
@using Umbraco.Web.Models;


<div class="links-info-blocks">
    <div class="wmcads-col-1">
        <h2>@Model.Value("pageLinksTitle")</h2>
    </div>
    <div class="link-info-blocks">
        @{
            var mntpLinks = Model.Value<IEnumerable<IPublishedContent>>("mntpLinks");
        }
        @foreach (var item in mntpLinks)
        {
            <div class="col-1">
                <div class="link-info-block">
                    <h3>@item.Name</h3>
                    @if (item.Value("copy") != null)
                    {
                        @Html.GetGridHtml(item.GetProperty("copy"));
                    }
                    <div class="text-right">
                        <a class="btn-secondary" href="@item.Url">Read more</a>
                    </div>
                </div>
            </div>
        }
    </div>
</div>