{"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":".filter(|&vid|"}]}
                .filter(|&vid| inner.int_unification_table().probe_value(vid).is_unknown())
                .map(|i| ty::IntVid::from_usize(i))
                .map(|v| Ty::new_int_var(self.tcx, v)),