syntax_data: {"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"Err(SpanSnippetError::DistinctSources(Box::new(DistinctSources"}]}
source_snippet:             Err(SpanSnippetError::DistinctSources(Box::new(DistinctSources {
context_before:         if local_begin.sf.start_pos != local_end.sf.start_pos {
context_after:                 begin: (local_begin.sf.name.clone(), local_begin.sf.start_pos),