in https://godot-rust.github.io/book/register/virtual-functions.html#types-of-scripts it links you to https://godot-rust.github.io/docs/gdext/master/godot/classes/trait.ScriptInstance.html which does not exists and should instead point to https://godot-rust.github.io/docs/gdext/master/godot/obj/script/trait.ScriptInstance.html