syntax_data: {"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"//!"}]}
source_snippet: //! - `TypeSuperFoldable`. This is implemented only for recursive types of
context_before: //!     It defines a "skeleton" of how they should be folded.
context_after: //!   interest, and defines the folding "skeleton" for these types. (This