{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"Some(self.root_var(self.shallow_resolve(ty).ty_vid()?))"}]}
        Some(self.root_var(self.shallow_resolve(ty).ty_vid()?))
    fn root_vid(&self, ty: Ty<'tcx>) -> Option<ty::TyVid> {
    }