syntax_data: {"ast_node_type":"other","tokens":[{"end":32,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: /// presenting user diagnostics.
context_before: /// whether the `a` type is the type that we should label as "expected" when
context_after: #[derive_where(Clone, Copy, Hash, PartialEq, Eq, Debug; I: Interner)]