syntax_data: {"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"e.file_name().to_str().map(|s|"}]}
source_snippet:                         e.file_name().to_str().map(|s| {
context_before:                     e.ok().and_then(|e| {
context_after:                             let file_name_str: Arc<str> = s.into();