syntax_data: {"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"//!"}]}
source_snippet: //!   - Types of interest, for which the methods delegate to the visitor.
context_before: //! - `TypeVisitable`. This is implemented once for many types, including:
context_after: //!   - All other types, including generic containers like `Vec` and `Option`.