syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"ty::Alias(kind,"}]}
source_snippet:             ty::Alias(kind, data) => ty::Alias(kind, data.try_fold_with(folder)?),
context_before:             }
context_after:             ty::Pat(ty, pat) => ty::Pat(ty.try_fold_with(folder)?, pat.try_fold_with(folder)?),