private void AddVirtualDocuments(RazorCodeDocument document, string relativePath)
 {
     foreach (var item in _project.EnumerateAscending(relativePath, ".razor"))
     {
         if (item.Filename == "_PageImports.razor")
         {
             var source = item.ToSourceDocument();
             var parsed = RazorParser.Parse(source);
             document.AddVirtualSyntaxTree(parsed);
         }
     }
 }