syntax_data: {"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"self,"}]}
source_snippet:     self, Asyncness, FallibleTypeFolder, GenericArgKind, GenericArgsRef, Ty, TyCtxt, TypeFoldable,
context_before: use crate::ty::{
context_after:     TypeFolder, TypeSuperFoldable, TypeVisitableExt, Upcast,