syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":".ok_or(SpanSnippetError::IllFormedSpan(sp))"}]}
source_snippet:                 .ok_or(SpanSnippetError::IllFormedSpan(sp))
context_before:                 .map(|s| s.to_string())
context_after:         })