Calling JS object member functions from Wasm

struct [[cheerp::genericjs]] Foo {
  client::HTMLElement* span;
  Foo() {
    span = client::document.createElement("span");
    span->set_textContent("Foo");
    client::document.get_body()->appendChild(span);
  }
  void makeBar() {
    span->set_textContent("Bar");
  }
}

struct [[cheerp::wasm]] Bar {
  Foo* foo; // obviously does not compile
  Bar() {
    foo = new Foo();
    foo->makeBar();
  }
}

[[cheerp::wasm]]
void webMain() {
  Bar* bar = new Bar();
}