syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"TypeFolder,"}]}
source_snippet:     TypeFolder, TypeSuperFoldable, TypeVisitableExt, Upcast,
context_before:     self, Asyncness, FallibleTypeFolder, GenericArgKind, GenericArgsRef, Ty, TyCtxt, TypeFoldable,
context_after: };