syntax_data: {"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"representable_ids:"}]}
source_snippet:     representable_ids: &FxHashSet<LocalDefId>,
context_before:     mut item_and_field_ids: Vec<(LocalDefId, LocalDefId)>,
context_after: ) -> ErrorGuaranteed {