{"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"Ty::new_int_var(self.tcx,"}]}
        Ty::new_int_var(self.tcx, next_int_var_id)
            self.inner.borrow_mut().int_unification_table().new_key(ty::IntVarValue::Unknown);
    }