syntax_data: {"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"ty::Ref(r,"}]}
source_snippet:             ty::Ref(r, ty, mutbl) => {
context_before:             ty::UnsafeBinder(f) => ty::UnsafeBinder(f.try_fold_with(folder)?),
context_after:                 ty::Ref(r.try_fold_with(folder)?, ty.try_fold_with(folder)?, mutbl)