pb duplicate interface between idl file and wrapper

Hi , i would need some help.

I have binded this c++ code :
```

struct btOverlapFilterCallback
{
virtual ~btOverlapFilterCallback()
{}
// return true when pairs need collision
virtual bool needBroadphaseCollision(btBroadphaseProxy* proxy0,btBroadphaseProxy* proxy1) = 0;
};

struct InterfaceWrapper : public emscripten::wrapper {
EMSCRIPTEN_WRAPPER(InterfaceWrapper);
bool needBroadphaseCollision(btBroadphaseProxy *proxy0,btBroadphaseProxy *proxy1) {
return call("needBroadphaseCollision",proxy0,proxy1 );
}
};

EMSCRIPTEN_BINDINGS(interface) {
emscripten::class_("btOverlapFilterCallback")
.function("needBroadphaseCollision", &btOverlapFilterCallback::needBroadphaseCollision, emscripten::allow_raw_pointers(),emscripten::pure_virtual())
.allow_subclass("InterfaceWrapper")
;
}
```

I managed doing it with c++ wrapper, but since btOverlapFilterCallback is too defined as interface in IDL file, I have this mistake message :

name: "BindingError", message: "Cannot register public name 'btOverlapFilterCallback' twice",

how to avoid this ? Or is it possible to wrap the btOverlapFilterCallback virtual func in the IDL file directly?