{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"self,"}]}
    self, ReBound, ReEarlyParam, ReErased, ReError, ReLateParam, RePlaceholder, ReStatic, ReVar,
use rustc_middle::ty::{
    Region, RegionVid, Ty, TyCtxt, TypeFoldable, fold_regions,