syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: /// different macro 2.0 macros.
context_before: /// (e.g., `macro` item, but not `macro_rules` item) and stay different if they came from
context_after: #[derive(Copy, Clone, Eq, PartialEq, Hash)]