sizing actually working correctly now

src/util/id.rs

@@ -54,3 +54,13 @@ impl CopyId {
         Id(self.0)
     }
 }
+
+pub trait IdUtil {
+    fn duplicate(&self) -> Self;
+}
+
+impl IdUtil for Option<Id> {
+    fn duplicate(&self) -> Self {
+        self.as_ref().map(|i| i.duplicate())
+    }
+}