{"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"Some(Err(FatalError))"}]}
                    Some(Err(FatalError)) => {
                    Some(Ok(result)) => Message::WorkItem::<B> { result: Ok(result) },
                        Message::WorkItem::<B> { result: Err(Some(WorkerFatalError)) }