Got at least one data fetching method working; turns out, we can't use a patched LogicStack to get the data

Vendor/Swan.Lite-3.1.0/Mappers/CopyableAttribute.cs

@@ -0,0 +1,13 @@
+using System;
+
+namespace Swan.Mappers
+{
+    /// <summary>
+    /// Represents an attribute to select which properties are copyable between objects.
+    /// </summary>
+    /// <seealso cref="Attribute" />
+    [AttributeUsage(AttributeTargets.Property)]
+    public class CopyableAttribute : Attribute
+    {
+    }
+}