CustomProcessXmlBasedLayoutDefinition.cs

namespace Helix.Skeleton.Feature.CustomLayoutResolver.Processors
{
    using Helix.Skeleton.Feature.CustomLayoutResolver.Constants;
    using Sitecore.Mvc.Pipelines.Response.BuildPageDefinition;
    using System.Collections.Generic;
    using System.Xml.Linq;

    public class CustomProcessXmlBasedLayoutDefinition : Sitecore.Mvc.Pipelines.Response.BuildPageDefinition.ProcessXmlBasedLayoutDefinition
    {
        protected override IEnumerable<Sitecore.Mvc.Presentation.Rendering> GetRenderings(XElement layoutDefinition, BuildPageDefinitionArgs args)
        {
            foreach (XElement deviceNode in layoutDefinition.Elements("d"))
            {
                // change the layout ID to the new layout item ID
                deviceNode.SetAttributeValue("l", CustomLayoutSettings.LayoutItemId);
            }

            return base.GetRenderings(layoutDefinition, args);
        }
    }
}