implement remaining logic

Signed-off-by: Folling <mail@folling.io>

src/objects/properties/property_source.hpp

@@ -1,7 +1,7 @@
 #pragma once
 
 #include <boost/variant2.hpp>
-
+#include <ikarus/id.h>
 #include <ikarus/objects/properties/property_source.h>
 
 struct IkarusPropertySource {
@@ -19,6 +19,9 @@ public:
 
     virtual ~IkarusPropertySource() = default;
 
+public:
+    [[nodiscard]] IkarusId get_id() const;
+
 public:
     Data data;
 };