syntax_data: {"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: /// (such as traits) or may be inserted during lowering.
context_before: /// an item's where clauses, hence the name `Clause`, and may either be user-written
context_after: #[derive(Clone, Copy, PartialEq, Eq, Hash, HashStable)]