All test cases passing

src/class_diagram/model/diagram.cc

@@ -219,12 +219,18 @@ void diagram::get_parents(
     bool found_new{false};
     for (const auto &parent : parents) {
         for (const auto &pp : parent.get().parents()) {
+            LOG_DBG("=-=-=-=-=-=-= {} HAS PARENT {} [{}]",
+                parent.get().full_name(false), pp.name(), pp.id());
             auto p = get_class(pp.id());
+
             if (p.has_value()) {
                 auto [it, found] = parents.emplace(std::ref(p.value()));
                 if (found)
                     found_new = true;
             }
+            else {
+                LOG_DBG("=-=-=-=-=-=-= {} NOT FOUND IN DIAGRAM", pp.id());
+            }
         }
     }