syntax_data: {"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"trait_ty.try_fold_with(folder)?,"}]}
source_snippet:                 trait_ty.try_fold_with(folder)?,
context_before:             ty::Dynamic(trait_ty, region, representation) => ty::Dynamic(
context_after:                 region.try_fold_with(folder)?,