syntax_data: {"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"self,"}]}
source_snippet:     self, GenericArgsRef, Term, TermKind, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable,
context_before: use rustc_middle::ty::{
context_after:     TypeVisitableExt, TypeVisitor,