syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// optional positions, e.g., `&'a T` or `dyn Tr + 'b`.
context_before:     /// Returns `true` if the region should be printed in
context_after:     /// This is typically the case for all non-`'_` regions.