shared children disappear

include/links/BaseLink.h

@@ -13,6 +13,10 @@ public:
     void removeChild(const LinkPtr& child) override {
         children_.erase(std::remove(children_.begin(), children_.end(), child), children_.end());
     }
+
+    ~BaseLink() override {
+        std::cout << "--- Destructor called for: " << "BaseLink" << "\n";
+    }
 protected:
     std::vector<LinkPtr> children_;
     std::weak_ptr<INode> owner_node_;