syntax_data: {"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"name:"}]}
source_snippet:                     name: local_begin.sf.name.clone(),
context_before:                 return Err(SpanSnippetError::MalformedForSourcemap(MalformedSourceMapPositions {
context_after:                     source_len,