fix: Casting to BuiltinType

Author: fuzzybinary

src/cpp/editor/godot_dart_editor_plugin.h

@@ -15,8 +15,8 @@ class GodotDartEditorPlugin : public godot::EditorPlugin {
   GodotDartEditorPlugin();
   ~GodotDartEditorPlugin();
 
-  virtual void _enter_tree() override;
-  virtual void _exit_tree() override;
+  void _enter_tree() override;
+  void _exit_tree() override;
 
   bool run_pub_get();
   bool run_build_runner();

src/cpp/script/dart_script.cpp

@@ -249,7 +249,11 @@ bool DartScript::_is_tool() const {
 
 godot::StringName DartScript::_get_instance_base_type() const {
   GodotDartBindings *bindings = GodotDartBindings::instance();
-  if (bindings == nullptr || _dart_type == nullptr) {
+  if (bindings == nullptr) {
+    return godot::StringName();
+  }
+  const_cast<DartScript *>(this)->refresh_type(false);
+  if (_dart_type == nullptr) {
     return godot::StringName();
   }
 

src/dart/godot_dart/lib/src/variant/variant.dart

@@ -196,7 +196,7 @@ class Variant implements Finalizable {
   }
 
   T? cast<T>() {
-    if (T is BuiltinType) {
+    if (<T>[] is List<BuiltinType>) {
       var typeInfo = gde.dartBindings.getGodotTypeInfo(T);
       return convertFromVariant(this, typeInfo) as T?;
     }