Hello, I am currently looking at adding support to my module to compile to GDExtension. My module makes a lot of use of the Variant::call method. However it seems to not work in GDExtension. To test I added this method to Summator template project:

void Summator::call(Variant var) { var.call("test", "Hello world!"); }

During compilation I get this error.
I am very new to godot-cpp so it's entirely possible this is user error.