List Child Pages from Changeable Source

ListChildPagesFromChangeableSource.cshtml

@inherits PartialViewMacroPage
@using Umbraco.Cms.Web
@using Umbraco.Cms.Web.Macros
@using Umbraco.Framework

@{
    @* Get the macro parameter and check it has a value otherwise set to empty hive Id *@
    var startNodeID = String.IsNullOrEmpty(Model.MacroParameters.startNodeID) ? HiveId.Empty.ToString() : Model.MacroParameters.startNodeID;
}

@* Check that startNodeID is not an empty HiveID AND also check the string is a valid HiveID *@
@if (startNodeID != HiveId.Empty.ToString() && HiveId.TryParse(startNodeID).Success)
{
    @* Get the start node as a dynamic node *@
    var startNode = Umbraco.GetDynamicContentById(startNodeID);
    
    @* Check that startNode has children pages, where the property umbracoNaviHide is not True *@    
    if (startNode.Children.Where("umbracoNaviHide != @0", "True").Any())
    {
        <ul>
            @* For each child page under startNode, where the property umbracoNaviHide is not True *@
            @foreach (var page in startNode.Children.Where("umbracoNaviHide != @0", "True"))
            { 
                <li><a href="@page.Url">@page.Name</a></li>
            }
        </ul>
    }    
}

What is the proper way to do a query like .Where("umbracoNaviHide != @0", "True") in 5.1+?