{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":".and_then(|adt|"}]}
            .and_then(|adt| sema.derive_helpers_in_scope(&adt))
            .and_then(|_| nameref.as_ref()?.syntax().ancestors().find_map(ast::Adt::cast))
            .unwrap_or_default();