{"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"cx.emit_err(session_diagnostics::ExpectedVersionLiteral"}]}
        cx.emit_err(session_diagnostics::ExpectedVersionLiteral { span: version_lit.span });
    let Some(version_str) = version_lit.value_str() else {
        return None;