syntax_data: {"ast_node_type":"other","tokens":[{"end":23,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // or dyn type.
context_before:         // the interesting parts are solely in the signature of the containing item's opaque type
context_after:         DefKind::InlineConst | DefKind::Closure | DefKind::SyntheticCoroutineBody => {}