syntax_data: {"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"//!"}]}
source_snippet: //! TypeVisitable`, and an instance `s = S(ty, u)`, it would be visited like so:
context_before: //! For example, if you have `struct S(Ty, U)` where `S: TypeVisitable` and `U:
context_after: //! ```text