syntax_data: {"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"return"}]}
source_snippet:             return Err(SpanLinesError::DistinctSources(Box::new(DistinctSources {
context_before:         if lo.file.start_pos != hi.file.start_pos {
context_after:                 begin: (lo.file.name.clone(), lo.file.start_pos),