It is tricky to figure out how to properly use WithBaseField generically

[lilizoey]

See this discord thread.

But basically there isn't any explicit documentation stating that in order to call self.base/base_mut(), the compiler must know the type of Self::Base. It could be useful to add an example somewhere of how to properly declare the bounds in the generic case.

The way to declare the bound in case you want the base to be Node3D is:

fn some_fn<T>(value: &T)
where
    T: WithBaseField + GodotClass<Base = Node3D>,
{
    let base = gd.base();
}