{"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"unwrap_or_emit_fatal(source_str_to_stream(psess,"}]}
    unwrap_or_emit_fatal(source_str_to_stream(psess, filename, source, Some(item.span)))
    let filename = FileName::macro_expansion_source_code(&source);
}