{"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"DeprecatedSince::NonStandard(_)"}]}
            DeprecatedSince::NonStandard(_) => true,
            // The `since` field doesn't have semantic purpose without `#![staged_api]`.
            // Assume deprecation is in effect if "since" field is absent or invalid.