expose isRenderable

thermion_dart/lib/src/filament/src/implementation/ffi_filament_app.dart

@@ -1264,4 +1264,8 @@ class FFIFilamentApp extends FilamentApp<Pointer> {
     });
     return FFISkybox(ptr);
   }
+
+  Future<bool> isRenderable(ThermionEntity entity) async {
+    return RenderableManager_isRenderable(renderableManager, entity);
+  }
 }

thermion_dart/lib/src/filament/src/interface/filament_app.dart

@@ -362,5 +362,5 @@ abstract class FilamentApp<T> {
   ///
   Future<Skybox> buildSkybox({Texture? texture = null});
 
-
+  Future<bool> isRenderable(ThermionEntity entity);
 }