syntax_data: {"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"src.get(..start_index).map(|s|"}]}
source_snippet:             src.get(..start_index).map(|s| s.to_string()).ok_or(SpanSnippetError::IllFormedSpan(sp))
context_before:         self.span_to_source(sp, |src, start_index, _| {
context_after:         })